Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Uwe Zeisberger | f30c226 | 2006-10-03 23:01:26 +0200 | [diff] [blame] | 2 | * linux/arch/arm/common/sa1111.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * SA1111 support |
| 5 | * |
| 6 | * Original code by John Dorsey |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This file contains all generic SA1111 support. |
| 13 | * |
| 14 | * All initialization functions provided here are intended to be called |
| 15 | * from machine specific code with proper arguments when required. |
| 16 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/module.h> |
Russell King | 17cf501 | 2016-08-31 08:49:45 +0100 | [diff] [blame^] | 18 | #include <linux/gpio/driver.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/init.h> |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 20 | #include <linux/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/kernel.h> |
| 22 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/errno.h> |
| 24 | #include <linux/ioport.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 25 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/slab.h> |
| 27 | #include <linux/spinlock.h> |
| 28 | #include <linux/dma-mapping.h> |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 29 | #include <linux/clk.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 30 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 32 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <asm/mach/irq.h> |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 34 | #include <asm/mach-types.h> |
Russell King | 45e109d | 2005-11-16 18:29:51 +0000 | [diff] [blame] | 35 | #include <asm/sizes.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #include <asm/hardware/sa1111.h> |
| 38 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 39 | /* SA1111 IRQs */ |
| 40 | #define IRQ_GPAIN0 (0) |
| 41 | #define IRQ_GPAIN1 (1) |
| 42 | #define IRQ_GPAIN2 (2) |
| 43 | #define IRQ_GPAIN3 (3) |
| 44 | #define IRQ_GPBIN0 (4) |
| 45 | #define IRQ_GPBIN1 (5) |
| 46 | #define IRQ_GPBIN2 (6) |
| 47 | #define IRQ_GPBIN3 (7) |
| 48 | #define IRQ_GPBIN4 (8) |
| 49 | #define IRQ_GPBIN5 (9) |
| 50 | #define IRQ_GPCIN0 (10) |
| 51 | #define IRQ_GPCIN1 (11) |
| 52 | #define IRQ_GPCIN2 (12) |
| 53 | #define IRQ_GPCIN3 (13) |
| 54 | #define IRQ_GPCIN4 (14) |
| 55 | #define IRQ_GPCIN5 (15) |
| 56 | #define IRQ_GPCIN6 (16) |
| 57 | #define IRQ_GPCIN7 (17) |
| 58 | #define IRQ_MSTXINT (18) |
| 59 | #define IRQ_MSRXINT (19) |
| 60 | #define IRQ_MSSTOPERRINT (20) |
| 61 | #define IRQ_TPTXINT (21) |
| 62 | #define IRQ_TPRXINT (22) |
| 63 | #define IRQ_TPSTOPERRINT (23) |
| 64 | #define SSPXMTINT (24) |
| 65 | #define SSPRCVINT (25) |
| 66 | #define SSPROR (26) |
| 67 | #define AUDXMTDMADONEA (32) |
| 68 | #define AUDRCVDMADONEA (33) |
| 69 | #define AUDXMTDMADONEB (34) |
| 70 | #define AUDRCVDMADONEB (35) |
| 71 | #define AUDTFSR (36) |
| 72 | #define AUDRFSR (37) |
| 73 | #define AUDTUR (38) |
| 74 | #define AUDROR (39) |
| 75 | #define AUDDTS (40) |
| 76 | #define AUDRDD (41) |
| 77 | #define AUDSTO (42) |
| 78 | #define IRQ_USBPWR (43) |
| 79 | #define IRQ_HCIM (44) |
| 80 | #define IRQ_HCIBUFFACC (45) |
| 81 | #define IRQ_HCIRMTWKP (46) |
| 82 | #define IRQ_NHCIMFCIR (47) |
| 83 | #define IRQ_USB_PORT_RESUME (48) |
| 84 | #define IRQ_S0_READY_NINT (49) |
| 85 | #define IRQ_S1_READY_NINT (50) |
| 86 | #define IRQ_S0_CD_VALID (51) |
| 87 | #define IRQ_S1_CD_VALID (52) |
| 88 | #define IRQ_S0_BVD1_STSCHG (53) |
| 89 | #define IRQ_S1_BVD1_STSCHG (54) |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 90 | #define SA1111_IRQ_NR (55) |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 91 | |
Russell King | 29c140b | 2012-02-03 19:03:31 +0000 | [diff] [blame] | 92 | extern void sa1110_mb_enable(void); |
| 93 | extern void sa1110_mb_disable(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
| 95 | /* |
| 96 | * We keep the following data for the overall SA1111. Note that the |
| 97 | * struct device and struct resource are "fake"; they should be supplied |
| 98 | * by the bus above us. However, in the interests of getting all SA1111 |
| 99 | * drivers converted over to the device model, we provide this as an |
| 100 | * anchor point for all the other drivers. |
| 101 | */ |
| 102 | struct sa1111 { |
| 103 | struct device *dev; |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 104 | struct clk *clk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | unsigned long phys; |
| 106 | int irq; |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 107 | int irq_base; /* base for cascaded on-chip IRQs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | spinlock_t lock; |
| 109 | void __iomem *base; |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 110 | struct sa1111_platform_data *pdata; |
Russell King | 17cf501 | 2016-08-31 08:49:45 +0100 | [diff] [blame^] | 111 | struct gpio_chip gc; |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 112 | #ifdef CONFIG_PM |
| 113 | void *saved_state; |
| 114 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | }; |
| 116 | |
| 117 | /* |
| 118 | * We _really_ need to eliminate this. Its only users |
| 119 | * are the PWM and DMA checking code. |
| 120 | */ |
| 121 | static struct sa1111 *g_sa1111; |
| 122 | |
| 123 | struct sa1111_dev_info { |
| 124 | unsigned long offset; |
| 125 | unsigned long skpcr_mask; |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 126 | bool dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | unsigned int devid; |
| 128 | unsigned int irq[6]; |
| 129 | }; |
| 130 | |
| 131 | static struct sa1111_dev_info sa1111_devices[] = { |
| 132 | { |
| 133 | .offset = SA1111_USB, |
| 134 | .skpcr_mask = SKPCR_UCLKEN, |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 135 | .dma = true, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | .devid = SA1111_DEVID_USB, |
| 137 | .irq = { |
| 138 | IRQ_USBPWR, |
| 139 | IRQ_HCIM, |
| 140 | IRQ_HCIBUFFACC, |
| 141 | IRQ_HCIRMTWKP, |
| 142 | IRQ_NHCIMFCIR, |
| 143 | IRQ_USB_PORT_RESUME |
| 144 | }, |
| 145 | }, |
| 146 | { |
| 147 | .offset = 0x0600, |
| 148 | .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN, |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 149 | .dma = true, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | .devid = SA1111_DEVID_SAC, |
| 151 | .irq = { |
| 152 | AUDXMTDMADONEA, |
| 153 | AUDXMTDMADONEB, |
| 154 | AUDRCVDMADONEA, |
| 155 | AUDRCVDMADONEB |
| 156 | }, |
| 157 | }, |
| 158 | { |
| 159 | .offset = 0x0800, |
| 160 | .skpcr_mask = SKPCR_SCLKEN, |
| 161 | .devid = SA1111_DEVID_SSP, |
| 162 | }, |
| 163 | { |
| 164 | .offset = SA1111_KBD, |
| 165 | .skpcr_mask = SKPCR_PTCLKEN, |
Russell King | e5c0fc4 | 2012-01-25 10:42:52 +0000 | [diff] [blame] | 166 | .devid = SA1111_DEVID_PS2_KBD, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | .irq = { |
| 168 | IRQ_TPRXINT, |
| 169 | IRQ_TPTXINT |
| 170 | }, |
| 171 | }, |
| 172 | { |
| 173 | .offset = SA1111_MSE, |
| 174 | .skpcr_mask = SKPCR_PMCLKEN, |
Russell King | e5c0fc4 | 2012-01-25 10:42:52 +0000 | [diff] [blame] | 175 | .devid = SA1111_DEVID_PS2_MSE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | .irq = { |
| 177 | IRQ_MSRXINT, |
| 178 | IRQ_MSTXINT |
| 179 | }, |
| 180 | }, |
| 181 | { |
| 182 | .offset = 0x1800, |
| 183 | .skpcr_mask = 0, |
| 184 | .devid = SA1111_DEVID_PCMCIA, |
| 185 | .irq = { |
| 186 | IRQ_S0_READY_NINT, |
| 187 | IRQ_S0_CD_VALID, |
| 188 | IRQ_S0_BVD1_STSCHG, |
| 189 | IRQ_S1_READY_NINT, |
| 190 | IRQ_S1_CD_VALID, |
| 191 | IRQ_S1_BVD1_STSCHG, |
| 192 | }, |
| 193 | }, |
| 194 | }; |
| 195 | |
| 196 | /* |
| 197 | * SA1111 interrupt support. Since clearing an IRQ while there are |
| 198 | * active IRQs causes the interrupt output to pulse, the upper levels |
| 199 | * will call us again if there are more interrupts to process. |
| 200 | */ |
Thomas Gleixner | bd0b9ac | 2015-09-14 10:42:37 +0200 | [diff] [blame] | 201 | static void sa1111_irq_handler(struct irq_desc *desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
| 203 | unsigned int stat0, stat1, i; |
Jiang Liu | f575398 | 2015-06-04 12:13:19 +0800 | [diff] [blame] | 204 | struct sa1111 *sachip = irq_desc_get_handler_data(desc); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 205 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 207 | stat0 = sa1111_readl(mapbase + SA1111_INTSTATCLR0); |
| 208 | stat1 = sa1111_readl(mapbase + SA1111_INTSTATCLR1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 210 | sa1111_writel(stat0, mapbase + SA1111_INTSTATCLR0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 212 | desc->irq_data.chip->irq_ack(&desc->irq_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 214 | sa1111_writel(stat1, mapbase + SA1111_INTSTATCLR1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | if (stat0 == 0 && stat1 == 0) { |
Thomas Gleixner | bd0b9ac | 2015-09-14 10:42:37 +0200 | [diff] [blame] | 217 | do_bad_IRQ(desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | return; |
| 219 | } |
| 220 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 221 | for (i = 0; stat0; i++, stat0 >>= 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | if (stat0 & 1) |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 223 | generic_handle_irq(i + sachip->irq_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 225 | for (i = 32; stat1; i++, stat1 >>= 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | if (stat1 & 1) |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 227 | generic_handle_irq(i + sachip->irq_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
| 229 | /* For level-based interrupts */ |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 230 | desc->irq_data.chip->irq_unmask(&desc->irq_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 233 | #define SA1111_IRQMASK_LO(x) (1 << (x - sachip->irq_base)) |
| 234 | #define SA1111_IRQMASK_HI(x) (1 << (x - sachip->irq_base - 32)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 236 | static void sa1111_ack_irq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
| 238 | } |
| 239 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 240 | static void sa1111_mask_lowirq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 242 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 243 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | unsigned long ie0; |
| 245 | |
| 246 | ie0 = sa1111_readl(mapbase + SA1111_INTEN0); |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 247 | ie0 &= ~SA1111_IRQMASK_LO(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | writel(ie0, mapbase + SA1111_INTEN0); |
| 249 | } |
| 250 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 251 | static void sa1111_unmask_lowirq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 253 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 254 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | unsigned long ie0; |
| 256 | |
| 257 | ie0 = sa1111_readl(mapbase + SA1111_INTEN0); |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 258 | ie0 |= SA1111_IRQMASK_LO(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | sa1111_writel(ie0, mapbase + SA1111_INTEN0); |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * Attempt to re-trigger the interrupt. The SA1111 contains a register |
| 264 | * (INTSET) which claims to do this. However, in practice no amount of |
| 265 | * manipulation of INTEN and INTSET guarantees that the interrupt will |
| 266 | * be triggered. In fact, its very difficult, if not impossible to get |
| 267 | * INTSET to re-trigger the interrupt. |
| 268 | */ |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 269 | static int sa1111_retrigger_lowirq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 271 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 272 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 273 | unsigned int mask = SA1111_IRQMASK_LO(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | unsigned long ip0; |
| 275 | int i; |
| 276 | |
| 277 | ip0 = sa1111_readl(mapbase + SA1111_INTPOL0); |
| 278 | for (i = 0; i < 8; i++) { |
| 279 | sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0); |
| 280 | sa1111_writel(ip0, mapbase + SA1111_INTPOL0); |
Pavel Machek | cae3998 | 2011-01-10 16:35:34 -0600 | [diff] [blame] | 281 | if (sa1111_readl(mapbase + SA1111_INTSTATCLR0) & mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | break; |
| 283 | } |
| 284 | |
| 285 | if (i == 8) |
Russell King | 4ed89f2 | 2014-10-28 11:26:42 +0000 | [diff] [blame] | 286 | pr_err("Danger Will Robinson: failed to re-trigger IRQ%d\n", |
| 287 | d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return i == 8 ? -1 : 0; |
| 289 | } |
| 290 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 291 | static int sa1111_type_lowirq(struct irq_data *d, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 293 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 294 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 295 | unsigned int mask = SA1111_IRQMASK_LO(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | unsigned long ip0; |
| 297 | |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 298 | if (flags == IRQ_TYPE_PROBE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return 0; |
| 300 | |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 301 | if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | return -EINVAL; |
| 303 | |
| 304 | ip0 = sa1111_readl(mapbase + SA1111_INTPOL0); |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 305 | if (flags & IRQ_TYPE_EDGE_RISING) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | ip0 &= ~mask; |
| 307 | else |
| 308 | ip0 |= mask; |
| 309 | sa1111_writel(ip0, mapbase + SA1111_INTPOL0); |
| 310 | sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0); |
| 311 | |
| 312 | return 0; |
| 313 | } |
| 314 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 315 | static int sa1111_wake_lowirq(struct irq_data *d, unsigned int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 317 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 318 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 319 | unsigned int mask = SA1111_IRQMASK_LO(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | unsigned long we0; |
| 321 | |
| 322 | we0 = sa1111_readl(mapbase + SA1111_WAKEEN0); |
| 323 | if (on) |
| 324 | we0 |= mask; |
| 325 | else |
| 326 | we0 &= ~mask; |
| 327 | sa1111_writel(we0, mapbase + SA1111_WAKEEN0); |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | |
David Brownell | 38c677c | 2006-08-01 22:26:25 +0100 | [diff] [blame] | 332 | static struct irq_chip sa1111_low_chip = { |
| 333 | .name = "SA1111-l", |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 334 | .irq_ack = sa1111_ack_irq, |
| 335 | .irq_mask = sa1111_mask_lowirq, |
| 336 | .irq_unmask = sa1111_unmask_lowirq, |
| 337 | .irq_retrigger = sa1111_retrigger_lowirq, |
| 338 | .irq_set_type = sa1111_type_lowirq, |
| 339 | .irq_set_wake = sa1111_wake_lowirq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | }; |
| 341 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 342 | static void sa1111_mask_highirq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 344 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 345 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | unsigned long ie1; |
| 347 | |
| 348 | ie1 = sa1111_readl(mapbase + SA1111_INTEN1); |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 349 | ie1 &= ~SA1111_IRQMASK_HI(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | sa1111_writel(ie1, mapbase + SA1111_INTEN1); |
| 351 | } |
| 352 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 353 | static void sa1111_unmask_highirq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 355 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 356 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | unsigned long ie1; |
| 358 | |
| 359 | ie1 = sa1111_readl(mapbase + SA1111_INTEN1); |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 360 | ie1 |= SA1111_IRQMASK_HI(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | sa1111_writel(ie1, mapbase + SA1111_INTEN1); |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * Attempt to re-trigger the interrupt. The SA1111 contains a register |
| 366 | * (INTSET) which claims to do this. However, in practice no amount of |
| 367 | * manipulation of INTEN and INTSET guarantees that the interrupt will |
| 368 | * be triggered. In fact, its very difficult, if not impossible to get |
| 369 | * INTSET to re-trigger the interrupt. |
| 370 | */ |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 371 | static int sa1111_retrigger_highirq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 373 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 374 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 375 | unsigned int mask = SA1111_IRQMASK_HI(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | unsigned long ip1; |
| 377 | int i; |
| 378 | |
| 379 | ip1 = sa1111_readl(mapbase + SA1111_INTPOL1); |
| 380 | for (i = 0; i < 8; i++) { |
| 381 | sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1); |
| 382 | sa1111_writel(ip1, mapbase + SA1111_INTPOL1); |
| 383 | if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask) |
| 384 | break; |
| 385 | } |
| 386 | |
| 387 | if (i == 8) |
Russell King | 4ed89f2 | 2014-10-28 11:26:42 +0000 | [diff] [blame] | 388 | pr_err("Danger Will Robinson: failed to re-trigger IRQ%d\n", |
| 389 | d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | return i == 8 ? -1 : 0; |
| 391 | } |
| 392 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 393 | static int sa1111_type_highirq(struct irq_data *d, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 395 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 396 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 397 | unsigned int mask = SA1111_IRQMASK_HI(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | unsigned long ip1; |
| 399 | |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 400 | if (flags == IRQ_TYPE_PROBE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return 0; |
| 402 | |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 403 | if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | return -EINVAL; |
| 405 | |
| 406 | ip1 = sa1111_readl(mapbase + SA1111_INTPOL1); |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 407 | if (flags & IRQ_TYPE_EDGE_RISING) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | ip1 &= ~mask; |
| 409 | else |
| 410 | ip1 |= mask; |
| 411 | sa1111_writel(ip1, mapbase + SA1111_INTPOL1); |
| 412 | sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1); |
| 413 | |
| 414 | return 0; |
| 415 | } |
| 416 | |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 417 | static int sa1111_wake_highirq(struct irq_data *d, unsigned int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | { |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 419 | struct sa1111 *sachip = irq_data_get_irq_chip_data(d); |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 420 | void __iomem *mapbase = sachip->base + SA1111_INTC; |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 421 | unsigned int mask = SA1111_IRQMASK_HI(d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | unsigned long we1; |
| 423 | |
| 424 | we1 = sa1111_readl(mapbase + SA1111_WAKEEN1); |
| 425 | if (on) |
| 426 | we1 |= mask; |
| 427 | else |
| 428 | we1 &= ~mask; |
| 429 | sa1111_writel(we1, mapbase + SA1111_WAKEEN1); |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
David Brownell | 38c677c | 2006-08-01 22:26:25 +0100 | [diff] [blame] | 434 | static struct irq_chip sa1111_high_chip = { |
| 435 | .name = "SA1111-h", |
Lennert Buytenhek | 8231e74 | 2010-11-29 10:20:06 +0100 | [diff] [blame] | 436 | .irq_ack = sa1111_ack_irq, |
| 437 | .irq_mask = sa1111_mask_highirq, |
| 438 | .irq_unmask = sa1111_unmask_highirq, |
| 439 | .irq_retrigger = sa1111_retrigger_highirq, |
| 440 | .irq_set_type = sa1111_type_highirq, |
| 441 | .irq_set_wake = sa1111_wake_highirq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | }; |
| 443 | |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 444 | static int sa1111_setup_irq(struct sa1111 *sachip, unsigned irq_base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { |
| 446 | void __iomem *irqbase = sachip->base + SA1111_INTC; |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 447 | unsigned i, irq; |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 448 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
| 450 | /* |
| 451 | * We're guaranteed that this region hasn't been taken. |
| 452 | */ |
| 453 | request_mem_region(sachip->phys + SA1111_INTC, 512, "irq"); |
| 454 | |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 455 | ret = irq_alloc_descs(-1, irq_base, SA1111_IRQ_NR, -1); |
| 456 | if (ret <= 0) { |
| 457 | dev_err(sachip->dev, "unable to allocate %u irqs: %d\n", |
| 458 | SA1111_IRQ_NR, ret); |
| 459 | if (ret == 0) |
| 460 | ret = -EINVAL; |
| 461 | return ret; |
| 462 | } |
| 463 | |
| 464 | sachip->irq_base = ret; |
| 465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | /* disable all IRQs */ |
| 467 | sa1111_writel(0, irqbase + SA1111_INTEN0); |
| 468 | sa1111_writel(0, irqbase + SA1111_INTEN1); |
| 469 | sa1111_writel(0, irqbase + SA1111_WAKEEN0); |
| 470 | sa1111_writel(0, irqbase + SA1111_WAKEEN1); |
| 471 | |
| 472 | /* |
| 473 | * detect on rising edge. Note: Feb 2001 Errata for SA1111 |
| 474 | * specifies that S0ReadyInt and S1ReadyInt should be '1'. |
| 475 | */ |
| 476 | sa1111_writel(0, irqbase + SA1111_INTPOL0); |
Russell King | 7c0091e | 2016-09-06 14:21:46 +0100 | [diff] [blame] | 477 | sa1111_writel(BIT(IRQ_S0_READY_NINT & 31) | |
| 478 | BIT(IRQ_S1_READY_NINT & 31), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | irqbase + SA1111_INTPOL1); |
| 480 | |
| 481 | /* clear all IRQs */ |
| 482 | sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0); |
| 483 | sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1); |
| 484 | |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 485 | for (i = IRQ_GPAIN0; i <= SSPROR; i++) { |
| 486 | irq = sachip->irq_base + i; |
Thomas Gleixner | f38c02f | 2011-03-24 13:35:09 +0100 | [diff] [blame] | 487 | irq_set_chip_and_handler(irq, &sa1111_low_chip, |
| 488 | handle_edge_irq); |
Thomas Gleixner | 9323f261 | 2011-03-24 13:29:39 +0100 | [diff] [blame] | 489 | irq_set_chip_data(irq, sachip); |
Rob Herring | e8d36d5 | 2015-07-27 15:55:13 -0500 | [diff] [blame] | 490 | irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 493 | for (i = AUDXMTDMADONEA; i <= IRQ_S1_BVD1_STSCHG; i++) { |
| 494 | irq = sachip->irq_base + i; |
Thomas Gleixner | f38c02f | 2011-03-24 13:35:09 +0100 | [diff] [blame] | 495 | irq_set_chip_and_handler(irq, &sa1111_high_chip, |
| 496 | handle_edge_irq); |
Thomas Gleixner | 9323f261 | 2011-03-24 13:29:39 +0100 | [diff] [blame] | 497 | irq_set_chip_data(irq, sachip); |
Rob Herring | e8d36d5 | 2015-07-27 15:55:13 -0500 | [diff] [blame] | 498 | irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | /* |
| 502 | * Register SA1111 interrupt |
| 503 | */ |
Thomas Gleixner | 6845664a | 2011-03-24 13:25:22 +0100 | [diff] [blame] | 504 | irq_set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING); |
Russell King | 056c0ac | 2015-06-16 23:06:25 +0100 | [diff] [blame] | 505 | irq_set_chained_handler_and_data(sachip->irq, sa1111_irq_handler, |
| 506 | sachip); |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 507 | |
| 508 | dev_info(sachip->dev, "Providing IRQ%u-%u\n", |
| 509 | sachip->irq_base, sachip->irq_base + SA1111_IRQ_NR - 1); |
| 510 | |
| 511 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | |
Russell King | ccb7d85 | 2016-09-06 16:01:32 +0100 | [diff] [blame] | 514 | static void sa1111_remove_irq(struct sa1111 *sachip) |
| 515 | { |
| 516 | void __iomem *irqbase = sachip->base + SA1111_INTC; |
| 517 | |
| 518 | /* disable all IRQs */ |
| 519 | sa1111_writel(0, irqbase + SA1111_INTEN0); |
| 520 | sa1111_writel(0, irqbase + SA1111_INTEN1); |
| 521 | sa1111_writel(0, irqbase + SA1111_WAKEEN0); |
| 522 | sa1111_writel(0, irqbase + SA1111_WAKEEN1); |
| 523 | |
| 524 | if (sachip->irq != NO_IRQ) { |
| 525 | irq_set_chained_handler_and_data(sachip->irq, NULL, NULL); |
| 526 | irq_free_descs(sachip->irq_base, SA1111_IRQ_NR); |
| 527 | |
| 528 | release_mem_region(sachip->phys + SA1111_INTC, 512); |
| 529 | } |
| 530 | } |
| 531 | |
Russell King | 17cf501 | 2016-08-31 08:49:45 +0100 | [diff] [blame^] | 532 | enum { |
| 533 | SA1111_GPIO_PXDDR = (SA1111_GPIO_PADDR - SA1111_GPIO_PADDR), |
| 534 | SA1111_GPIO_PXDRR = (SA1111_GPIO_PADRR - SA1111_GPIO_PADDR), |
| 535 | SA1111_GPIO_PXDWR = (SA1111_GPIO_PADWR - SA1111_GPIO_PADDR), |
| 536 | SA1111_GPIO_PXSDR = (SA1111_GPIO_PASDR - SA1111_GPIO_PADDR), |
| 537 | SA1111_GPIO_PXSSR = (SA1111_GPIO_PASSR - SA1111_GPIO_PADDR), |
| 538 | }; |
| 539 | |
| 540 | static struct sa1111 *gc_to_sa1111(struct gpio_chip *gc) |
| 541 | { |
| 542 | return container_of(gc, struct sa1111, gc); |
| 543 | } |
| 544 | |
| 545 | static void __iomem *sa1111_gpio_map_reg(struct sa1111 *sachip, unsigned offset) |
| 546 | { |
| 547 | void __iomem *reg = sachip->base + SA1111_GPIO; |
| 548 | |
| 549 | if (offset < 4) |
| 550 | return reg + SA1111_GPIO_PADDR; |
| 551 | if (offset < 10) |
| 552 | return reg + SA1111_GPIO_PBDDR; |
| 553 | if (offset < 18) |
| 554 | return reg + SA1111_GPIO_PCDDR; |
| 555 | return NULL; |
| 556 | } |
| 557 | |
| 558 | static u32 sa1111_gpio_map_bit(unsigned offset) |
| 559 | { |
| 560 | if (offset < 4) |
| 561 | return BIT(offset); |
| 562 | if (offset < 10) |
| 563 | return BIT(offset - 4); |
| 564 | if (offset < 18) |
| 565 | return BIT(offset - 10); |
| 566 | return 0; |
| 567 | } |
| 568 | |
| 569 | static void sa1111_gpio_modify(void __iomem *reg, u32 mask, u32 set) |
| 570 | { |
| 571 | u32 val; |
| 572 | |
| 573 | val = readl_relaxed(reg); |
| 574 | val &= ~mask; |
| 575 | val |= mask & set; |
| 576 | writel_relaxed(val, reg); |
| 577 | } |
| 578 | |
| 579 | static int sa1111_gpio_get_direction(struct gpio_chip *gc, unsigned offset) |
| 580 | { |
| 581 | struct sa1111 *sachip = gc_to_sa1111(gc); |
| 582 | void __iomem *reg = sa1111_gpio_map_reg(sachip, offset); |
| 583 | u32 mask = sa1111_gpio_map_bit(offset); |
| 584 | |
| 585 | return !!(readl_relaxed(reg + SA1111_GPIO_PXDDR) & mask); |
| 586 | } |
| 587 | |
| 588 | static int sa1111_gpio_direction_input(struct gpio_chip *gc, unsigned offset) |
| 589 | { |
| 590 | struct sa1111 *sachip = gc_to_sa1111(gc); |
| 591 | unsigned long flags; |
| 592 | void __iomem *reg = sa1111_gpio_map_reg(sachip, offset); |
| 593 | u32 mask = sa1111_gpio_map_bit(offset); |
| 594 | |
| 595 | spin_lock_irqsave(&sachip->lock, flags); |
| 596 | sa1111_gpio_modify(reg + SA1111_GPIO_PXDDR, mask, mask); |
| 597 | sa1111_gpio_modify(reg + SA1111_GPIO_PXSDR, mask, mask); |
| 598 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 599 | |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | static int sa1111_gpio_direction_output(struct gpio_chip *gc, unsigned offset, |
| 604 | int value) |
| 605 | { |
| 606 | struct sa1111 *sachip = gc_to_sa1111(gc); |
| 607 | unsigned long flags; |
| 608 | void __iomem *reg = sa1111_gpio_map_reg(sachip, offset); |
| 609 | u32 mask = sa1111_gpio_map_bit(offset); |
| 610 | |
| 611 | spin_lock_irqsave(&sachip->lock, flags); |
| 612 | sa1111_gpio_modify(reg + SA1111_GPIO_PXDWR, mask, value ? mask : 0); |
| 613 | sa1111_gpio_modify(reg + SA1111_GPIO_PXSSR, mask, value ? mask : 0); |
| 614 | sa1111_gpio_modify(reg + SA1111_GPIO_PXDDR, mask, 0); |
| 615 | sa1111_gpio_modify(reg + SA1111_GPIO_PXSDR, mask, 0); |
| 616 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 617 | |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | static int sa1111_gpio_get(struct gpio_chip *gc, unsigned offset) |
| 622 | { |
| 623 | struct sa1111 *sachip = gc_to_sa1111(gc); |
| 624 | void __iomem *reg = sa1111_gpio_map_reg(sachip, offset); |
| 625 | u32 mask = sa1111_gpio_map_bit(offset); |
| 626 | |
| 627 | return !!(readl_relaxed(reg + SA1111_GPIO_PXDRR) & mask); |
| 628 | } |
| 629 | |
| 630 | static void sa1111_gpio_set(struct gpio_chip *gc, unsigned offset, int value) |
| 631 | { |
| 632 | struct sa1111 *sachip = gc_to_sa1111(gc); |
| 633 | unsigned long flags; |
| 634 | void __iomem *reg = sa1111_gpio_map_reg(sachip, offset); |
| 635 | u32 mask = sa1111_gpio_map_bit(offset); |
| 636 | |
| 637 | spin_lock_irqsave(&sachip->lock, flags); |
| 638 | sa1111_gpio_modify(reg + SA1111_GPIO_PXDWR, mask, value ? mask : 0); |
| 639 | sa1111_gpio_modify(reg + SA1111_GPIO_PXSSR, mask, value ? mask : 0); |
| 640 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 641 | } |
| 642 | |
| 643 | static void sa1111_gpio_set_multiple(struct gpio_chip *gc, unsigned long *mask, |
| 644 | unsigned long *bits) |
| 645 | { |
| 646 | struct sa1111 *sachip = gc_to_sa1111(gc); |
| 647 | unsigned long flags; |
| 648 | void __iomem *reg = sachip->base + SA1111_GPIO; |
| 649 | u32 msk, val; |
| 650 | |
| 651 | msk = *mask; |
| 652 | val = *bits; |
| 653 | |
| 654 | spin_lock_irqsave(&sachip->lock, flags); |
| 655 | sa1111_gpio_modify(reg + SA1111_GPIO_PADWR, msk & 15, val); |
| 656 | sa1111_gpio_modify(reg + SA1111_GPIO_PASSR, msk & 15, val); |
| 657 | sa1111_gpio_modify(reg + SA1111_GPIO_PBDWR, (msk >> 4) & 255, val >> 4); |
| 658 | sa1111_gpio_modify(reg + SA1111_GPIO_PBSSR, (msk >> 4) & 255, val >> 4); |
| 659 | sa1111_gpio_modify(reg + SA1111_GPIO_PCDWR, (msk >> 12) & 255, val >> 12); |
| 660 | sa1111_gpio_modify(reg + SA1111_GPIO_PCSSR, (msk >> 12) & 255, val >> 12); |
| 661 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 662 | } |
| 663 | |
| 664 | static int sa1111_gpio_to_irq(struct gpio_chip *gc, unsigned offset) |
| 665 | { |
| 666 | struct sa1111 *sachip = gc_to_sa1111(gc); |
| 667 | |
| 668 | return sachip->irq_base + offset; |
| 669 | } |
| 670 | |
| 671 | static int sa1111_setup_gpios(struct sa1111 *sachip) |
| 672 | { |
| 673 | sachip->gc.label = "sa1111"; |
| 674 | sachip->gc.parent = sachip->dev; |
| 675 | sachip->gc.owner = THIS_MODULE; |
| 676 | sachip->gc.get_direction = sa1111_gpio_get_direction; |
| 677 | sachip->gc.direction_input = sa1111_gpio_direction_input; |
| 678 | sachip->gc.direction_output = sa1111_gpio_direction_output; |
| 679 | sachip->gc.get = sa1111_gpio_get; |
| 680 | sachip->gc.set = sa1111_gpio_set; |
| 681 | sachip->gc.set_multiple = sa1111_gpio_set_multiple; |
| 682 | sachip->gc.to_irq = sa1111_gpio_to_irq; |
| 683 | sachip->gc.base = -1; |
| 684 | sachip->gc.ngpio = 18; |
| 685 | |
| 686 | return devm_gpiochip_add_data(sachip->dev, &sachip->gc, sachip); |
| 687 | } |
| 688 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | /* |
| 690 | * Bring the SA1111 out of reset. This requires a set procedure: |
| 691 | * 1. nRESET asserted (by hardware) |
| 692 | * 2. CLK turned on from SA1110 |
| 693 | * 3. nRESET deasserted |
| 694 | * 4. VCO turned on, PLL_BYPASS turned off |
| 695 | * 5. Wait lock time, then assert RCLKEn |
| 696 | * 7. PCR set to allow clocking of individual functions |
| 697 | * |
| 698 | * Until we've done this, the only registers we can access are: |
| 699 | * SBI_SKCR |
| 700 | * SBI_SMCR |
| 701 | * SBI_SKID |
| 702 | */ |
| 703 | static void sa1111_wake(struct sa1111 *sachip) |
| 704 | { |
| 705 | unsigned long flags, r; |
| 706 | |
| 707 | spin_lock_irqsave(&sachip->lock, flags); |
| 708 | |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 709 | clk_enable(sachip->clk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | |
| 711 | /* |
| 712 | * Turn VCO on, and disable PLL Bypass. |
| 713 | */ |
| 714 | r = sa1111_readl(sachip->base + SA1111_SKCR); |
| 715 | r &= ~SKCR_VCO_OFF; |
| 716 | sa1111_writel(r, sachip->base + SA1111_SKCR); |
| 717 | r |= SKCR_PLL_BYPASS | SKCR_OE_EN; |
| 718 | sa1111_writel(r, sachip->base + SA1111_SKCR); |
| 719 | |
| 720 | /* |
| 721 | * Wait lock time. SA1111 manual _doesn't_ |
| 722 | * specify a figure for this! We choose 100us. |
| 723 | */ |
| 724 | udelay(100); |
| 725 | |
| 726 | /* |
| 727 | * Enable RCLK. We also ensure that RDYEN is set. |
| 728 | */ |
| 729 | r |= SKCR_RCLKEN | SKCR_RDYEN; |
| 730 | sa1111_writel(r, sachip->base + SA1111_SKCR); |
| 731 | |
| 732 | /* |
| 733 | * Wait 14 RCLK cycles for the chip to finish coming out |
| 734 | * of reset. (RCLK=24MHz). This is 590ns. |
| 735 | */ |
| 736 | udelay(1); |
| 737 | |
| 738 | /* |
| 739 | * Ensure all clocks are initially off. |
| 740 | */ |
| 741 | sa1111_writel(0, sachip->base + SA1111_SKPCR); |
| 742 | |
| 743 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 744 | } |
| 745 | |
| 746 | #ifdef CONFIG_ARCH_SA1100 |
| 747 | |
| 748 | static u32 sa1111_dma_mask[] = { |
| 749 | ~0, |
| 750 | ~(1 << 20), |
| 751 | ~(1 << 23), |
| 752 | ~(1 << 24), |
| 753 | ~(1 << 25), |
| 754 | ~(1 << 20), |
| 755 | ~(1 << 20), |
| 756 | 0, |
| 757 | }; |
| 758 | |
| 759 | /* |
| 760 | * Configure the SA1111 shared memory controller. |
| 761 | */ |
| 762 | void |
| 763 | sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac, |
| 764 | unsigned int cas_latency) |
| 765 | { |
| 766 | unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC); |
| 767 | |
| 768 | if (cas_latency == 3) |
| 769 | smcr |= SMCR_CLAT; |
| 770 | |
| 771 | sa1111_writel(smcr, sachip->base + SA1111_SMCR); |
| 772 | |
| 773 | /* |
| 774 | * Now clear the bits in the DMA mask to work around the SA1111 |
| 775 | * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion |
| 776 | * Chip Specification Update, June 2000, Erratum #7). |
| 777 | */ |
| 778 | if (sachip->dev->dma_mask) |
| 779 | *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2]; |
| 780 | |
| 781 | sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2]; |
| 782 | } |
Russell King | 0703ed2 | 2011-07-04 08:32:21 +0100 | [diff] [blame] | 783 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | static void sa1111_dev_release(struct device *_dev) |
| 786 | { |
| 787 | struct sa1111_dev *dev = SA1111_DEV(_dev); |
| 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | kfree(dev); |
| 790 | } |
| 791 | |
| 792 | static int |
| 793 | sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent, |
| 794 | struct sa1111_dev_info *info) |
| 795 | { |
| 796 | struct sa1111_dev *dev; |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 797 | unsigned i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | int ret; |
| 799 | |
Russell King | d2a02b9 | 2006-03-20 19:46:41 +0000 | [diff] [blame] | 800 | dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | if (!dev) { |
| 802 | ret = -ENOMEM; |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 803 | goto err_alloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 806 | device_initialize(&dev->dev); |
Kay Sievers | 3f97870 | 2008-05-30 17:42:11 +0200 | [diff] [blame] | 807 | dev_set_name(&dev->dev, "%4.4lx", info->offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | dev->devid = info->devid; |
| 809 | dev->dev.parent = sachip->dev; |
| 810 | dev->dev.bus = &sa1111_bus_type; |
| 811 | dev->dev.release = sa1111_dev_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | dev->res.start = sachip->phys + info->offset; |
| 813 | dev->res.end = dev->res.start + 511; |
Kay Sievers | 3f97870 | 2008-05-30 17:42:11 +0200 | [diff] [blame] | 814 | dev->res.name = dev_name(&dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | dev->res.flags = IORESOURCE_MEM; |
| 816 | dev->mapbase = sachip->base + info->offset; |
| 817 | dev->skpcr_mask = info->skpcr_mask; |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 818 | |
| 819 | for (i = 0; i < ARRAY_SIZE(info->irq); i++) |
| 820 | dev->irq[i] = sachip->irq_base + info->irq[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 822 | /* |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 823 | * If the parent device has a DMA mask associated with it, and |
| 824 | * this child supports DMA, propagate it down to the children. |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 825 | */ |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 826 | if (info->dma && sachip->dev->dma_mask) { |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 827 | dev->dma_mask = *sachip->dev->dma_mask; |
| 828 | dev->dev.dma_mask = &dev->dma_mask; |
| 829 | dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask; |
| 830 | } |
| 831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | ret = request_resource(parent, &dev->res); |
| 833 | if (ret) { |
Russell King | 22eeaff | 2012-01-29 10:28:09 +0000 | [diff] [blame] | 834 | dev_err(sachip->dev, "failed to allocate resource for %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | dev->res.name); |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 836 | goto err_resource; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
| 838 | |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 839 | ret = device_add(&dev->dev); |
| 840 | if (ret) |
| 841 | goto err_add; |
| 842 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 844 | err_add: |
| 845 | release_resource(&dev->res); |
| 846 | err_resource: |
| 847 | put_device(&dev->dev); |
| 848 | err_alloc: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | return ret; |
| 850 | } |
| 851 | |
| 852 | /** |
| 853 | * sa1111_probe - probe for a single SA1111 chip. |
| 854 | * @phys_addr: physical address of device. |
| 855 | * |
| 856 | * Probe for a SA1111 chip. This must be called |
| 857 | * before any other SA1111-specific code. |
| 858 | * |
| 859 | * Returns: |
| 860 | * %-ENODEV device not found. |
| 861 | * %-EBUSY physical address already marked in-use. |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 862 | * %-EINVAL no platform data passed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | * %0 successful. |
| 864 | */ |
Greg Kroah-Hartman | 351a102 | 2012-12-21 14:02:24 -0800 | [diff] [blame] | 865 | static int __sa1111_probe(struct device *me, struct resource *mem, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | { |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 867 | struct sa1111_platform_data *pd = me->platform_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | struct sa1111 *sachip; |
| 869 | unsigned long id; |
David Brownell | 416112f | 2006-08-27 13:09:14 +0100 | [diff] [blame] | 870 | unsigned int has_devs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | int i, ret = -ENODEV; |
| 872 | |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 873 | if (!pd) |
| 874 | return -EINVAL; |
| 875 | |
Russell King | 7d53c1f | 2016-09-06 15:29:26 +0100 | [diff] [blame] | 876 | sachip = devm_kzalloc(me, sizeof(struct sa1111), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | if (!sachip) |
| 878 | return -ENOMEM; |
| 879 | |
Russell King | deee856 | 2016-08-30 22:47:35 +0100 | [diff] [blame] | 880 | sachip->clk = devm_clk_get(me, "SA1111_CLK"); |
| 881 | if (IS_ERR(sachip->clk)) |
| 882 | return PTR_ERR(sachip->clk); |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 883 | |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 884 | ret = clk_prepare(sachip->clk); |
| 885 | if (ret) |
Russell King | deee856 | 2016-08-30 22:47:35 +0100 | [diff] [blame] | 886 | return ret; |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 887 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | spin_lock_init(&sachip->lock); |
| 889 | |
| 890 | sachip->dev = me; |
| 891 | dev_set_drvdata(sachip->dev, sachip); |
| 892 | |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 893 | sachip->pdata = pd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | sachip->phys = mem->start; |
| 895 | sachip->irq = irq; |
| 896 | |
| 897 | /* |
| 898 | * Map the whole region. This also maps the |
| 899 | * registers for our children. |
| 900 | */ |
| 901 | sachip->base = ioremap(mem->start, PAGE_SIZE * 2); |
| 902 | if (!sachip->base) { |
| 903 | ret = -ENOMEM; |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 904 | goto err_clk_unprep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Probe for the chip. Only touch the SBI registers. |
| 909 | */ |
| 910 | id = sa1111_readl(sachip->base + SA1111_SKID); |
| 911 | if ((id & SKID_ID_MASK) != SKID_SA1111_ID) { |
| 912 | printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id); |
| 913 | ret = -ENODEV; |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 914 | goto err_unmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
| 916 | |
Russell King | 4ed89f2 | 2014-10-28 11:26:42 +0000 | [diff] [blame] | 917 | pr_info("SA1111 Microprocessor Companion Chip: silicon revision %lx, metal revision %lx\n", |
| 918 | (id & SKID_SIREV_MASK) >> 4, id & SKID_MTREV_MASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
| 920 | /* |
| 921 | * We found it. Wake the chip up, and initialise. |
| 922 | */ |
| 923 | sa1111_wake(sachip); |
| 924 | |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 925 | /* |
| 926 | * The interrupt controller must be initialised before any |
| 927 | * other device to ensure that the interrupts are available. |
| 928 | */ |
| 929 | if (sachip->irq != NO_IRQ) { |
| 930 | ret = sa1111_setup_irq(sachip, pd->irq_base); |
| 931 | if (ret) |
Russell King | 87d5dd6 | 2016-09-06 16:09:17 +0100 | [diff] [blame] | 932 | goto err_clk; |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 933 | } |
| 934 | |
Russell King | 17cf501 | 2016-08-31 08:49:45 +0100 | [diff] [blame^] | 935 | /* Setup the GPIOs - should really be done after the IRQ setup */ |
| 936 | ret = sa1111_setup_gpios(sachip); |
| 937 | if (ret) |
| 938 | goto err_irq; |
| 939 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | #ifdef CONFIG_ARCH_SA1100 |
David Brownell | 416112f | 2006-08-27 13:09:14 +0100 | [diff] [blame] | 941 | { |
| 942 | unsigned int val; |
| 943 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | /* |
| 945 | * The SDRAM configuration of the SA1110 and the SA1111 must |
| 946 | * match. This is very important to ensure that SA1111 accesses |
| 947 | * don't corrupt the SDRAM. Note that this ungates the SA1111's |
| 948 | * MBGNT signal, so we must have called sa1110_mb_disable() |
| 949 | * beforehand. |
| 950 | */ |
| 951 | sa1111_configure_smc(sachip, 1, |
| 952 | FExtr(MDCNFG, MDCNFG_SA1110_DRAC0), |
| 953 | FExtr(MDCNFG, MDCNFG_SA1110_TDL0)); |
| 954 | |
| 955 | /* |
| 956 | * We only need to turn on DCLK whenever we want to use the |
| 957 | * DMA. It can otherwise be held firmly in the off position. |
| 958 | * (currently, we always enable it.) |
| 959 | */ |
| 960 | val = sa1111_readl(sachip->base + SA1111_SKPCR); |
| 961 | sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR); |
| 962 | |
| 963 | /* |
| 964 | * Enable the SA1110 memory bus request and grant signals. |
| 965 | */ |
| 966 | sa1110_mb_enable(); |
David Brownell | 416112f | 2006-08-27 13:09:14 +0100 | [diff] [blame] | 967 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | #endif |
| 969 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | g_sa1111 = sachip; |
| 971 | |
| 972 | has_devs = ~0; |
Russell King | 07be45f | 2012-01-26 13:34:21 +0000 | [diff] [blame] | 973 | if (pd) |
| 974 | has_devs &= ~pd->disable_devs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
| 976 | for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++) |
Russell King | e5c0fc4 | 2012-01-25 10:42:52 +0000 | [diff] [blame] | 977 | if (sa1111_devices[i].devid & has_devs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | sa1111_init_one_child(sachip, mem, &sa1111_devices[i]); |
| 979 | |
| 980 | return 0; |
| 981 | |
Russell King | 17cf501 | 2016-08-31 08:49:45 +0100 | [diff] [blame^] | 982 | err_irq: |
| 983 | sa1111_remove_irq(sachip); |
Russell King | 87d5dd6 | 2016-09-06 16:09:17 +0100 | [diff] [blame] | 984 | err_clk: |
| 985 | clk_disable(sachip->clk); |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 986 | err_unmap: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | iounmap(sachip->base); |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 988 | err_clk_unprep: |
| 989 | clk_unprepare(sachip->clk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | return ret; |
| 991 | } |
| 992 | |
Russell King | 522c37b | 2005-06-22 09:52:26 +0100 | [diff] [blame] | 993 | static int sa1111_remove_one(struct device *dev, void *data) |
| 994 | { |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 995 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
Russell King | eac8dbf | 2016-09-03 09:14:58 +0100 | [diff] [blame] | 996 | if (dev->bus != &sa1111_bus_type) |
| 997 | return 0; |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 998 | device_del(&sadev->dev); |
| 999 | release_resource(&sadev->res); |
| 1000 | put_device(&sadev->dev); |
Russell King | 522c37b | 2005-06-22 09:52:26 +0100 | [diff] [blame] | 1001 | return 0; |
| 1002 | } |
| 1003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | static void __sa1111_remove(struct sa1111 *sachip) |
| 1005 | { |
Russell King | 522c37b | 2005-06-22 09:52:26 +0100 | [diff] [blame] | 1006 | device_for_each_child(sachip->dev, NULL, sa1111_remove_one); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
Russell King | ccb7d85 | 2016-09-06 16:01:32 +0100 | [diff] [blame] | 1008 | sa1111_remove_irq(sachip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 1010 | clk_disable(sachip->clk); |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 1011 | clk_unprepare(sachip->clk); |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 1012 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | iounmap(sachip->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } |
| 1015 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | struct sa1111_save_data { |
| 1017 | unsigned int skcr; |
| 1018 | unsigned int skpcr; |
| 1019 | unsigned int skcdr; |
| 1020 | unsigned char skaud; |
| 1021 | unsigned char skpwm0; |
| 1022 | unsigned char skpwm1; |
| 1023 | |
| 1024 | /* |
| 1025 | * Interrupt controller |
| 1026 | */ |
| 1027 | unsigned int intpol0; |
| 1028 | unsigned int intpol1; |
| 1029 | unsigned int inten0; |
| 1030 | unsigned int inten1; |
| 1031 | unsigned int wakepol0; |
| 1032 | unsigned int wakepol1; |
| 1033 | unsigned int wakeen0; |
| 1034 | unsigned int wakeen1; |
| 1035 | }; |
| 1036 | |
| 1037 | #ifdef CONFIG_PM |
| 1038 | |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1039 | static int sa1111_suspend_noirq(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | { |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1041 | struct sa1111 *sachip = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | struct sa1111_save_data *save; |
| 1043 | unsigned long flags; |
| 1044 | unsigned int val; |
| 1045 | void __iomem *base; |
| 1046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL); |
| 1048 | if (!save) |
| 1049 | return -ENOMEM; |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 1050 | sachip->saved_state = save; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
| 1052 | spin_lock_irqsave(&sachip->lock, flags); |
| 1053 | |
| 1054 | /* |
| 1055 | * Save state. |
| 1056 | */ |
| 1057 | base = sachip->base; |
| 1058 | save->skcr = sa1111_readl(base + SA1111_SKCR); |
| 1059 | save->skpcr = sa1111_readl(base + SA1111_SKPCR); |
| 1060 | save->skcdr = sa1111_readl(base + SA1111_SKCDR); |
| 1061 | save->skaud = sa1111_readl(base + SA1111_SKAUD); |
| 1062 | save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0); |
| 1063 | save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1); |
| 1064 | |
Russell King | a22db0f3 | 2012-02-03 19:05:13 +0000 | [diff] [blame] | 1065 | sa1111_writel(0, sachip->base + SA1111_SKPWM0); |
| 1066 | sa1111_writel(0, sachip->base + SA1111_SKPWM1); |
| 1067 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | base = sachip->base + SA1111_INTC; |
| 1069 | save->intpol0 = sa1111_readl(base + SA1111_INTPOL0); |
| 1070 | save->intpol1 = sa1111_readl(base + SA1111_INTPOL1); |
| 1071 | save->inten0 = sa1111_readl(base + SA1111_INTEN0); |
| 1072 | save->inten1 = sa1111_readl(base + SA1111_INTEN1); |
| 1073 | save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0); |
| 1074 | save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1); |
| 1075 | save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0); |
| 1076 | save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1); |
| 1077 | |
| 1078 | /* |
| 1079 | * Disable. |
| 1080 | */ |
| 1081 | val = sa1111_readl(sachip->base + SA1111_SKCR); |
| 1082 | sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 1084 | clk_disable(sachip->clk); |
| 1085 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1087 | |
Russell King | 29c140b | 2012-02-03 19:03:31 +0000 | [diff] [blame] | 1088 | #ifdef CONFIG_ARCH_SA1100 |
| 1089 | sa1110_mb_disable(); |
| 1090 | #endif |
| 1091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | return 0; |
| 1093 | } |
| 1094 | |
| 1095 | /* |
| 1096 | * sa1111_resume - Restore the SA1111 device state. |
| 1097 | * @dev: device to restore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | * |
| 1099 | * Restore the general state of the SA1111; clock control and |
| 1100 | * interrupt controller. Other parts of the SA1111 must be |
| 1101 | * restored by their respective drivers, and must be called |
| 1102 | * via LDM after this function. |
| 1103 | */ |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1104 | static int sa1111_resume_noirq(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | { |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1106 | struct sa1111 *sachip = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | struct sa1111_save_data *save; |
| 1108 | unsigned long flags, id; |
| 1109 | void __iomem *base; |
| 1110 | |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 1111 | save = sachip->saved_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | if (!save) |
| 1113 | return 0; |
| 1114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | /* |
| 1116 | * Ensure that the SA1111 is still here. |
| 1117 | * FIXME: shouldn't do this here. |
| 1118 | */ |
| 1119 | id = sa1111_readl(sachip->base + SA1111_SKID); |
| 1120 | if ((id & SKID_ID_MASK) != SKID_SA1111_ID) { |
| 1121 | __sa1111_remove(sachip); |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1122 | dev_set_drvdata(dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | kfree(save); |
| 1124 | return 0; |
| 1125 | } |
| 1126 | |
| 1127 | /* |
| 1128 | * First of all, wake up the chip. |
| 1129 | */ |
| 1130 | sa1111_wake(sachip); |
Marek Vašut | 3defb24 | 2010-05-26 23:53:09 +0100 | [diff] [blame] | 1131 | |
Russell King | 29c140b | 2012-02-03 19:03:31 +0000 | [diff] [blame] | 1132 | #ifdef CONFIG_ARCH_SA1100 |
| 1133 | /* Enable the memory bus request/grant signals */ |
| 1134 | sa1110_mb_enable(); |
| 1135 | #endif |
| 1136 | |
Marek Vašut | 3defb24 | 2010-05-26 23:53:09 +0100 | [diff] [blame] | 1137 | /* |
| 1138 | * Only lock for write ops. Also, sa1111_wake must be called with |
| 1139 | * released spinlock! |
| 1140 | */ |
| 1141 | spin_lock_irqsave(&sachip->lock, flags); |
| 1142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0); |
| 1144 | sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1); |
| 1145 | |
| 1146 | base = sachip->base; |
| 1147 | sa1111_writel(save->skcr, base + SA1111_SKCR); |
| 1148 | sa1111_writel(save->skpcr, base + SA1111_SKPCR); |
| 1149 | sa1111_writel(save->skcdr, base + SA1111_SKCDR); |
| 1150 | sa1111_writel(save->skaud, base + SA1111_SKAUD); |
| 1151 | sa1111_writel(save->skpwm0, base + SA1111_SKPWM0); |
| 1152 | sa1111_writel(save->skpwm1, base + SA1111_SKPWM1); |
| 1153 | |
| 1154 | base = sachip->base + SA1111_INTC; |
| 1155 | sa1111_writel(save->intpol0, base + SA1111_INTPOL0); |
| 1156 | sa1111_writel(save->intpol1, base + SA1111_INTPOL1); |
| 1157 | sa1111_writel(save->inten0, base + SA1111_INTEN0); |
| 1158 | sa1111_writel(save->inten1, base + SA1111_INTEN1); |
| 1159 | sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0); |
| 1160 | sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1); |
| 1161 | sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0); |
| 1162 | sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1); |
| 1163 | |
| 1164 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1165 | |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 1166 | sachip->saved_state = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | kfree(save); |
| 1168 | |
| 1169 | return 0; |
| 1170 | } |
| 1171 | |
| 1172 | #else |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1173 | #define sa1111_suspend_noirq NULL |
| 1174 | #define sa1111_resume_noirq NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | #endif |
| 1176 | |
Greg Kroah-Hartman | 351a102 | 2012-12-21 14:02:24 -0800 | [diff] [blame] | 1177 | static int sa1111_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | struct resource *mem; |
| 1180 | int irq; |
| 1181 | |
| 1182 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1183 | if (!mem) |
| 1184 | return -EINVAL; |
| 1185 | irq = platform_get_irq(pdev, 0); |
David Vrabel | 4894473 | 2006-01-19 17:56:29 +0000 | [diff] [blame] | 1186 | if (irq < 0) |
Russell King | cb03440 | 2016-09-03 10:21:51 +0100 | [diff] [blame] | 1187 | return irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1189 | return __sa1111_probe(&pdev->dev, mem, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | } |
| 1191 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1192 | static int sa1111_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1194 | struct sa1111 *sachip = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | |
| 1196 | if (sachip) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | #ifdef CONFIG_PM |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 1198 | kfree(sachip->saved_state); |
| 1199 | sachip->saved_state = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | #endif |
Julia Lawall | f2d2420 | 2010-07-30 17:17:28 +0200 | [diff] [blame] | 1201 | __sa1111_remove(sachip); |
| 1202 | platform_set_drvdata(pdev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | } |
| 1204 | |
| 1205 | return 0; |
| 1206 | } |
| 1207 | |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1208 | static struct dev_pm_ops sa1111_pm_ops = { |
| 1209 | .suspend_noirq = sa1111_suspend_noirq, |
| 1210 | .resume_noirq = sa1111_resume_noirq, |
| 1211 | }; |
| 1212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | /* |
| 1214 | * Not sure if this should be on the system bus or not yet. |
| 1215 | * We really want some way to register a system device at |
| 1216 | * the per-machine level, and then have this driver pick |
| 1217 | * up the registered devices. |
| 1218 | * |
| 1219 | * We also need to handle the SDRAM configuration for |
| 1220 | * PXA250/SA1110 machine classes. |
| 1221 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1222 | static struct platform_driver sa1111_device_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | .probe = sa1111_probe, |
| 1224 | .remove = sa1111_remove, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1225 | .driver = { |
| 1226 | .name = "sa1111", |
Russell King | 06dfe5c | 2016-09-06 14:34:05 +0100 | [diff] [blame] | 1227 | .pm = &sa1111_pm_ops, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1228 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | }; |
| 1230 | |
| 1231 | /* |
| 1232 | * Get the parent device driver (us) structure |
| 1233 | * from a child function device |
| 1234 | */ |
| 1235 | static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev) |
| 1236 | { |
| 1237 | return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent); |
| 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * The bits in the opdiv field are non-linear. |
| 1242 | */ |
| 1243 | static unsigned char opdiv_table[] = { 1, 4, 2, 8 }; |
| 1244 | |
| 1245 | static unsigned int __sa1111_pll_clock(struct sa1111 *sachip) |
| 1246 | { |
| 1247 | unsigned int skcdr, fbdiv, ipdiv, opdiv; |
| 1248 | |
| 1249 | skcdr = sa1111_readl(sachip->base + SA1111_SKCDR); |
| 1250 | |
| 1251 | fbdiv = (skcdr & 0x007f) + 2; |
| 1252 | ipdiv = ((skcdr & 0x0f80) >> 7) + 2; |
| 1253 | opdiv = opdiv_table[(skcdr & 0x3000) >> 12]; |
| 1254 | |
| 1255 | return 3686400 * fbdiv / (ipdiv * opdiv); |
| 1256 | } |
| 1257 | |
| 1258 | /** |
| 1259 | * sa1111_pll_clock - return the current PLL clock frequency. |
| 1260 | * @sadev: SA1111 function block |
| 1261 | * |
| 1262 | * BUG: we should look at SKCR. We also blindly believe that |
| 1263 | * the chip is being fed with the 3.6864MHz clock. |
| 1264 | * |
| 1265 | * Returns the PLL clock in Hz. |
| 1266 | */ |
| 1267 | unsigned int sa1111_pll_clock(struct sa1111_dev *sadev) |
| 1268 | { |
| 1269 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1270 | |
| 1271 | return __sa1111_pll_clock(sachip); |
| 1272 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1273 | EXPORT_SYMBOL(sa1111_pll_clock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | |
| 1275 | /** |
| 1276 | * sa1111_select_audio_mode - select I2S or AC link mode |
| 1277 | * @sadev: SA1111 function block |
| 1278 | * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S |
| 1279 | * |
| 1280 | * Frob the SKCR to select AC Link mode or I2S mode for |
| 1281 | * the audio block. |
| 1282 | */ |
| 1283 | void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode) |
| 1284 | { |
| 1285 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1286 | unsigned long flags; |
| 1287 | unsigned int val; |
| 1288 | |
| 1289 | spin_lock_irqsave(&sachip->lock, flags); |
| 1290 | |
| 1291 | val = sa1111_readl(sachip->base + SA1111_SKCR); |
| 1292 | if (mode == SA1111_AUDIO_I2S) { |
| 1293 | val &= ~SKCR_SELAC; |
| 1294 | } else { |
| 1295 | val |= SKCR_SELAC; |
| 1296 | } |
| 1297 | sa1111_writel(val, sachip->base + SA1111_SKCR); |
| 1298 | |
| 1299 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1300 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1301 | EXPORT_SYMBOL(sa1111_select_audio_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
| 1303 | /** |
| 1304 | * sa1111_set_audio_rate - set the audio sample rate |
| 1305 | * @sadev: SA1111 SAC function block |
| 1306 | * @rate: sample rate to select |
| 1307 | */ |
| 1308 | int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate) |
| 1309 | { |
| 1310 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1311 | unsigned int div; |
| 1312 | |
| 1313 | if (sadev->devid != SA1111_DEVID_SAC) |
| 1314 | return -EINVAL; |
| 1315 | |
| 1316 | div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate; |
| 1317 | if (div == 0) |
| 1318 | div = 1; |
| 1319 | if (div > 128) |
| 1320 | div = 128; |
| 1321 | |
| 1322 | sa1111_writel(div - 1, sachip->base + SA1111_SKAUD); |
| 1323 | |
| 1324 | return 0; |
| 1325 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1326 | EXPORT_SYMBOL(sa1111_set_audio_rate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
| 1328 | /** |
| 1329 | * sa1111_get_audio_rate - get the audio sample rate |
| 1330 | * @sadev: SA1111 SAC function block device |
| 1331 | */ |
| 1332 | int sa1111_get_audio_rate(struct sa1111_dev *sadev) |
| 1333 | { |
| 1334 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1335 | unsigned long div; |
| 1336 | |
| 1337 | if (sadev->devid != SA1111_DEVID_SAC) |
| 1338 | return -EINVAL; |
| 1339 | |
| 1340 | div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1; |
| 1341 | |
| 1342 | return __sa1111_pll_clock(sachip) / (256 * div); |
| 1343 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1344 | EXPORT_SYMBOL(sa1111_get_audio_rate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | void sa1111_set_io_dir(struct sa1111_dev *sadev, |
| 1347 | unsigned int bits, unsigned int dir, |
| 1348 | unsigned int sleep_dir) |
| 1349 | { |
| 1350 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1351 | unsigned long flags; |
| 1352 | unsigned int val; |
| 1353 | void __iomem *gpio = sachip->base + SA1111_GPIO; |
| 1354 | |
| 1355 | #define MODIFY_BITS(port, mask, dir) \ |
| 1356 | if (mask) { \ |
| 1357 | val = sa1111_readl(port); \ |
| 1358 | val &= ~(mask); \ |
| 1359 | val |= (dir) & (mask); \ |
| 1360 | sa1111_writel(val, port); \ |
| 1361 | } |
| 1362 | |
| 1363 | spin_lock_irqsave(&sachip->lock, flags); |
| 1364 | MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir); |
| 1365 | MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8); |
| 1366 | MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16); |
| 1367 | |
| 1368 | MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir); |
| 1369 | MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8); |
| 1370 | MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16); |
| 1371 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1372 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1373 | EXPORT_SYMBOL(sa1111_set_io_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
| 1375 | void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v) |
| 1376 | { |
| 1377 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1378 | unsigned long flags; |
| 1379 | unsigned int val; |
| 1380 | void __iomem *gpio = sachip->base + SA1111_GPIO; |
| 1381 | |
| 1382 | spin_lock_irqsave(&sachip->lock, flags); |
| 1383 | MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v); |
| 1384 | MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8); |
| 1385 | MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16); |
| 1386 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1387 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1388 | EXPORT_SYMBOL(sa1111_set_io); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
| 1390 | void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v) |
| 1391 | { |
| 1392 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1393 | unsigned long flags; |
| 1394 | unsigned int val; |
| 1395 | void __iomem *gpio = sachip->base + SA1111_GPIO; |
| 1396 | |
| 1397 | spin_lock_irqsave(&sachip->lock, flags); |
| 1398 | MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v); |
| 1399 | MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8); |
| 1400 | MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16); |
| 1401 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1402 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1403 | EXPORT_SYMBOL(sa1111_set_sleep_io); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | |
| 1405 | /* |
| 1406 | * Individual device operations. |
| 1407 | */ |
| 1408 | |
| 1409 | /** |
| 1410 | * sa1111_enable_device - enable an on-chip SA1111 function block |
| 1411 | * @sadev: SA1111 function block device to enable |
| 1412 | */ |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1413 | int sa1111_enable_device(struct sa1111_dev *sadev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | { |
| 1415 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1416 | unsigned long flags; |
| 1417 | unsigned int val; |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1418 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1420 | if (sachip->pdata && sachip->pdata->enable) |
| 1421 | ret = sachip->pdata->enable(sachip->pdata->data, sadev->devid); |
| 1422 | |
| 1423 | if (ret == 0) { |
| 1424 | spin_lock_irqsave(&sachip->lock, flags); |
| 1425 | val = sa1111_readl(sachip->base + SA1111_SKPCR); |
| 1426 | sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR); |
| 1427 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1428 | } |
| 1429 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1431 | EXPORT_SYMBOL(sa1111_enable_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
| 1433 | /** |
| 1434 | * sa1111_disable_device - disable an on-chip SA1111 function block |
| 1435 | * @sadev: SA1111 function block device to disable |
| 1436 | */ |
| 1437 | void sa1111_disable_device(struct sa1111_dev *sadev) |
| 1438 | { |
| 1439 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1440 | unsigned long flags; |
| 1441 | unsigned int val; |
| 1442 | |
| 1443 | spin_lock_irqsave(&sachip->lock, flags); |
| 1444 | val = sa1111_readl(sachip->base + SA1111_SKPCR); |
| 1445 | sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR); |
| 1446 | spin_unlock_irqrestore(&sachip->lock, flags); |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1447 | |
| 1448 | if (sachip->pdata && sachip->pdata->disable) |
| 1449 | sachip->pdata->disable(sachip->pdata->data, sadev->devid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1451 | EXPORT_SYMBOL(sa1111_disable_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | |
| 1453 | /* |
| 1454 | * SA1111 "Register Access Bus." |
| 1455 | * |
| 1456 | * We model this as a regular bus type, and hang devices directly |
| 1457 | * off this. |
| 1458 | */ |
| 1459 | static int sa1111_match(struct device *_dev, struct device_driver *_drv) |
| 1460 | { |
| 1461 | struct sa1111_dev *dev = SA1111_DEV(_dev); |
| 1462 | struct sa1111_driver *drv = SA1111_DRV(_drv); |
| 1463 | |
Marek Szyprowski | 17f29d3 | 2016-02-15 09:24:05 +0100 | [diff] [blame] | 1464 | return !!(dev->devid & drv->devid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | } |
| 1466 | |
| 1467 | static int sa1111_bus_suspend(struct device *dev, pm_message_t state) |
| 1468 | { |
| 1469 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1470 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1471 | int ret = 0; |
| 1472 | |
| 1473 | if (drv && drv->suspend) |
| 1474 | ret = drv->suspend(sadev, state); |
| 1475 | return ret; |
| 1476 | } |
| 1477 | |
| 1478 | static int sa1111_bus_resume(struct device *dev) |
| 1479 | { |
| 1480 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1481 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1482 | int ret = 0; |
| 1483 | |
| 1484 | if (drv && drv->resume) |
| 1485 | ret = drv->resume(sadev); |
| 1486 | return ret; |
| 1487 | } |
| 1488 | |
Russell King | 6bd72f0 | 2012-01-26 11:01:18 +0000 | [diff] [blame] | 1489 | static void sa1111_bus_shutdown(struct device *dev) |
| 1490 | { |
| 1491 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1492 | |
| 1493 | if (drv && drv->shutdown) |
| 1494 | drv->shutdown(SA1111_DEV(dev)); |
| 1495 | } |
| 1496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | static int sa1111_bus_probe(struct device *dev) |
| 1498 | { |
| 1499 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1500 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1501 | int ret = -ENODEV; |
| 1502 | |
| 1503 | if (drv->probe) |
| 1504 | ret = drv->probe(sadev); |
| 1505 | return ret; |
| 1506 | } |
| 1507 | |
| 1508 | static int sa1111_bus_remove(struct device *dev) |
| 1509 | { |
| 1510 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1511 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1512 | int ret = 0; |
| 1513 | |
| 1514 | if (drv->remove) |
| 1515 | ret = drv->remove(sadev); |
| 1516 | return ret; |
| 1517 | } |
| 1518 | |
| 1519 | struct bus_type sa1111_bus_type = { |
| 1520 | .name = "sa1111-rab", |
| 1521 | .match = sa1111_match, |
Russell King | 2876ba4 | 2006-01-05 14:32:32 +0000 | [diff] [blame] | 1522 | .probe = sa1111_bus_probe, |
| 1523 | .remove = sa1111_bus_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | .suspend = sa1111_bus_suspend, |
| 1525 | .resume = sa1111_bus_resume, |
Russell King | 6bd72f0 | 2012-01-26 11:01:18 +0000 | [diff] [blame] | 1526 | .shutdown = sa1111_bus_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | }; |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1528 | EXPORT_SYMBOL(sa1111_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | |
| 1530 | int sa1111_driver_register(struct sa1111_driver *driver) |
| 1531 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | driver->drv.bus = &sa1111_bus_type; |
| 1533 | return driver_register(&driver->drv); |
| 1534 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1535 | EXPORT_SYMBOL(sa1111_driver_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
| 1537 | void sa1111_driver_unregister(struct sa1111_driver *driver) |
| 1538 | { |
| 1539 | driver_unregister(&driver->drv); |
| 1540 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1541 | EXPORT_SYMBOL(sa1111_driver_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 1543 | #ifdef CONFIG_DMABOUNCE |
| 1544 | /* |
| 1545 | * According to the "Intel StrongARM SA-1111 Microprocessor Companion |
| 1546 | * Chip Specification Update" (June 2000), erratum #7, there is a |
| 1547 | * significant bug in the SA1111 SDRAM shared memory controller. If |
| 1548 | * an access to a region of memory above 1MB relative to the bank base, |
| 1549 | * it is important that address bit 10 _NOT_ be asserted. Depending |
| 1550 | * on the configuration of the RAM, bit 10 may correspond to one |
| 1551 | * of several different (processor-relative) address bits. |
| 1552 | * |
| 1553 | * This routine only identifies whether or not a given DMA address |
| 1554 | * is susceptible to the bug. |
| 1555 | * |
| 1556 | * This should only get called for sa1111_device types due to the |
| 1557 | * way we configure our device dma_masks. |
| 1558 | */ |
| 1559 | static int sa1111_needs_bounce(struct device *dev, dma_addr_t addr, size_t size) |
| 1560 | { |
| 1561 | /* |
| 1562 | * Section 4.6 of the "Intel StrongARM SA-1111 Development Module |
| 1563 | * User's Guide" mentions that jumpers R51 and R52 control the |
| 1564 | * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or |
| 1565 | * SDRAM bank 1 on Neponset). The default configuration selects |
| 1566 | * Assabet, so any address in bank 1 is necessarily invalid. |
| 1567 | */ |
| 1568 | return (machine_is_assabet() || machine_is_pfs168()) && |
| 1569 | (addr >= 0xc8000000 || (addr + size) >= 0xc8000000); |
| 1570 | } |
| 1571 | |
| 1572 | static int sa1111_notifier_call(struct notifier_block *n, unsigned long action, |
| 1573 | void *data) |
| 1574 | { |
| 1575 | struct sa1111_dev *dev = SA1111_DEV(data); |
| 1576 | |
| 1577 | switch (action) { |
| 1578 | case BUS_NOTIFY_ADD_DEVICE: |
| 1579 | if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) { |
| 1580 | int ret = dmabounce_register_dev(&dev->dev, 1024, 4096, |
| 1581 | sa1111_needs_bounce); |
| 1582 | if (ret) |
| 1583 | dev_err(&dev->dev, "failed to register with dmabounce: %d\n", ret); |
| 1584 | } |
| 1585 | break; |
| 1586 | |
| 1587 | case BUS_NOTIFY_DEL_DEVICE: |
| 1588 | if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) |
| 1589 | dmabounce_unregister_dev(&dev->dev); |
| 1590 | break; |
| 1591 | } |
| 1592 | return NOTIFY_OK; |
| 1593 | } |
| 1594 | |
| 1595 | static struct notifier_block sa1111_bus_notifier = { |
| 1596 | .notifier_call = sa1111_notifier_call, |
| 1597 | }; |
| 1598 | #endif |
| 1599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | static int __init sa1111_init(void) |
| 1601 | { |
| 1602 | int ret = bus_register(&sa1111_bus_type); |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 1603 | #ifdef CONFIG_DMABOUNCE |
| 1604 | if (ret == 0) |
| 1605 | bus_register_notifier(&sa1111_bus_type, &sa1111_bus_notifier); |
| 1606 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | if (ret == 0) |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1608 | platform_driver_register(&sa1111_device_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | return ret; |
| 1610 | } |
| 1611 | |
| 1612 | static void __exit sa1111_exit(void) |
| 1613 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1614 | platform_driver_unregister(&sa1111_device_driver); |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 1615 | #ifdef CONFIG_DMABOUNCE |
| 1616 | bus_unregister_notifier(&sa1111_bus_type, &sa1111_bus_notifier); |
| 1617 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | bus_unregister(&sa1111_bus_type); |
| 1619 | } |
| 1620 | |
Russell King | 7272438 | 2005-11-15 19:04:22 +0000 | [diff] [blame] | 1621 | subsys_initcall(sa1111_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | module_exit(sa1111_exit); |
| 1623 | |
| 1624 | MODULE_DESCRIPTION("Intel Corporation SA1111 core driver"); |
| 1625 | MODULE_LICENSE("GPL"); |