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> |
| 18 | #include <linux/init.h> |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 19 | #include <linux/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/kernel.h> |
| 21 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/errno.h> |
| 23 | #include <linux/ioport.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 24 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/slab.h> |
| 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/dma-mapping.h> |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 28 | #include <linux/clk.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 29 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 31 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/mach/irq.h> |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 33 | #include <asm/mach-types.h> |
Russell King | 45e109d | 2005-11-16 18:29:51 +0000 | [diff] [blame] | 34 | #include <asm/sizes.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #include <asm/hardware/sa1111.h> |
| 37 | |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 38 | /* SA1111 IRQs */ |
| 39 | #define IRQ_GPAIN0 (0) |
| 40 | #define IRQ_GPAIN1 (1) |
| 41 | #define IRQ_GPAIN2 (2) |
| 42 | #define IRQ_GPAIN3 (3) |
| 43 | #define IRQ_GPBIN0 (4) |
| 44 | #define IRQ_GPBIN1 (5) |
| 45 | #define IRQ_GPBIN2 (6) |
| 46 | #define IRQ_GPBIN3 (7) |
| 47 | #define IRQ_GPBIN4 (8) |
| 48 | #define IRQ_GPBIN5 (9) |
| 49 | #define IRQ_GPCIN0 (10) |
| 50 | #define IRQ_GPCIN1 (11) |
| 51 | #define IRQ_GPCIN2 (12) |
| 52 | #define IRQ_GPCIN3 (13) |
| 53 | #define IRQ_GPCIN4 (14) |
| 54 | #define IRQ_GPCIN5 (15) |
| 55 | #define IRQ_GPCIN6 (16) |
| 56 | #define IRQ_GPCIN7 (17) |
| 57 | #define IRQ_MSTXINT (18) |
| 58 | #define IRQ_MSRXINT (19) |
| 59 | #define IRQ_MSSTOPERRINT (20) |
| 60 | #define IRQ_TPTXINT (21) |
| 61 | #define IRQ_TPRXINT (22) |
| 62 | #define IRQ_TPSTOPERRINT (23) |
| 63 | #define SSPXMTINT (24) |
| 64 | #define SSPRCVINT (25) |
| 65 | #define SSPROR (26) |
| 66 | #define AUDXMTDMADONEA (32) |
| 67 | #define AUDRCVDMADONEA (33) |
| 68 | #define AUDXMTDMADONEB (34) |
| 69 | #define AUDRCVDMADONEB (35) |
| 70 | #define AUDTFSR (36) |
| 71 | #define AUDRFSR (37) |
| 72 | #define AUDTUR (38) |
| 73 | #define AUDROR (39) |
| 74 | #define AUDDTS (40) |
| 75 | #define AUDRDD (41) |
| 76 | #define AUDSTO (42) |
| 77 | #define IRQ_USBPWR (43) |
| 78 | #define IRQ_HCIM (44) |
| 79 | #define IRQ_HCIBUFFACC (45) |
| 80 | #define IRQ_HCIRMTWKP (46) |
| 81 | #define IRQ_NHCIMFCIR (47) |
| 82 | #define IRQ_USB_PORT_RESUME (48) |
| 83 | #define IRQ_S0_READY_NINT (49) |
| 84 | #define IRQ_S1_READY_NINT (50) |
| 85 | #define IRQ_S0_CD_VALID (51) |
| 86 | #define IRQ_S1_CD_VALID (52) |
| 87 | #define IRQ_S0_BVD1_STSCHG (53) |
| 88 | #define IRQ_S1_BVD1_STSCHG (54) |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 89 | #define SA1111_IRQ_NR (55) |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 90 | |
Russell King | 29c140b | 2012-02-03 19:03:31 +0000 | [diff] [blame] | 91 | extern void sa1110_mb_enable(void); |
| 92 | extern void sa1110_mb_disable(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | /* |
| 95 | * We keep the following data for the overall SA1111. Note that the |
| 96 | * struct device and struct resource are "fake"; they should be supplied |
| 97 | * by the bus above us. However, in the interests of getting all SA1111 |
| 98 | * drivers converted over to the device model, we provide this as an |
| 99 | * anchor point for all the other drivers. |
| 100 | */ |
| 101 | struct sa1111 { |
| 102 | struct device *dev; |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 103 | struct clk *clk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | unsigned long phys; |
| 105 | int irq; |
Eric Miao | 19851c5 | 2009-12-26 16:23:02 +0800 | [diff] [blame] | 106 | int irq_base; /* base for cascaded on-chip IRQs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | spinlock_t lock; |
| 108 | void __iomem *base; |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 109 | struct sa1111_platform_data *pdata; |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 110 | #ifdef CONFIG_PM |
| 111 | void *saved_state; |
| 112 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | }; |
| 114 | |
| 115 | /* |
| 116 | * We _really_ need to eliminate this. Its only users |
| 117 | * are the PWM and DMA checking code. |
| 118 | */ |
| 119 | static struct sa1111 *g_sa1111; |
| 120 | |
| 121 | struct sa1111_dev_info { |
| 122 | unsigned long offset; |
| 123 | unsigned long skpcr_mask; |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 124 | bool dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | unsigned int devid; |
| 126 | unsigned int irq[6]; |
| 127 | }; |
| 128 | |
| 129 | static struct sa1111_dev_info sa1111_devices[] = { |
| 130 | { |
| 131 | .offset = SA1111_USB, |
| 132 | .skpcr_mask = SKPCR_UCLKEN, |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 133 | .dma = true, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | .devid = SA1111_DEVID_USB, |
| 135 | .irq = { |
| 136 | IRQ_USBPWR, |
| 137 | IRQ_HCIM, |
| 138 | IRQ_HCIBUFFACC, |
| 139 | IRQ_HCIRMTWKP, |
| 140 | IRQ_NHCIMFCIR, |
| 141 | IRQ_USB_PORT_RESUME |
| 142 | }, |
| 143 | }, |
| 144 | { |
| 145 | .offset = 0x0600, |
| 146 | .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN, |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 147 | .dma = true, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | .devid = SA1111_DEVID_SAC, |
| 149 | .irq = { |
| 150 | AUDXMTDMADONEA, |
| 151 | AUDXMTDMADONEB, |
| 152 | AUDRCVDMADONEA, |
| 153 | AUDRCVDMADONEB |
| 154 | }, |
| 155 | }, |
| 156 | { |
| 157 | .offset = 0x0800, |
| 158 | .skpcr_mask = SKPCR_SCLKEN, |
| 159 | .devid = SA1111_DEVID_SSP, |
| 160 | }, |
| 161 | { |
| 162 | .offset = SA1111_KBD, |
| 163 | .skpcr_mask = SKPCR_PTCLKEN, |
Russell King | e5c0fc4 | 2012-01-25 10:42:52 +0000 | [diff] [blame] | 164 | .devid = SA1111_DEVID_PS2_KBD, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | .irq = { |
| 166 | IRQ_TPRXINT, |
| 167 | IRQ_TPTXINT |
| 168 | }, |
| 169 | }, |
| 170 | { |
| 171 | .offset = SA1111_MSE, |
| 172 | .skpcr_mask = SKPCR_PMCLKEN, |
Russell King | e5c0fc4 | 2012-01-25 10:42:52 +0000 | [diff] [blame] | 173 | .devid = SA1111_DEVID_PS2_MSE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | .irq = { |
| 175 | IRQ_MSRXINT, |
| 176 | IRQ_MSTXINT |
| 177 | }, |
| 178 | }, |
| 179 | { |
| 180 | .offset = 0x1800, |
| 181 | .skpcr_mask = 0, |
| 182 | .devid = SA1111_DEVID_PCMCIA, |
| 183 | .irq = { |
| 184 | IRQ_S0_READY_NINT, |
| 185 | IRQ_S0_CD_VALID, |
| 186 | IRQ_S0_BVD1_STSCHG, |
| 187 | IRQ_S1_READY_NINT, |
| 188 | IRQ_S1_CD_VALID, |
| 189 | IRQ_S1_BVD1_STSCHG, |
| 190 | }, |
| 191 | }, |
| 192 | }; |
| 193 | |
| 194 | /* |
| 195 | * SA1111 interrupt support. Since clearing an IRQ while there are |
| 196 | * active IRQs causes the interrupt output to pulse, the upper levels |
| 197 | * will call us again if there are more interrupts to process. |
| 198 | */ |
| 199 | static void |
Thomas Gleixner | b9dce3a | 2015-07-13 10:15:12 +0200 | [diff] [blame] | 200 | sa1111_irq_handler(unsigned int __irq, struct irq_desc *desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | { |
Thomas Gleixner | b9dce3a | 2015-07-13 10:15:12 +0200 | [diff] [blame] | 202 | unsigned int irq = irq_desc_get_irq(desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 217 | do_bad_IRQ(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); |
| 477 | sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) | |
| 478 | SA1111_IRQMASK_HI(IRQ_S1_READY_NINT), |
| 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 | |
| 514 | /* |
| 515 | * Bring the SA1111 out of reset. This requires a set procedure: |
| 516 | * 1. nRESET asserted (by hardware) |
| 517 | * 2. CLK turned on from SA1110 |
| 518 | * 3. nRESET deasserted |
| 519 | * 4. VCO turned on, PLL_BYPASS turned off |
| 520 | * 5. Wait lock time, then assert RCLKEn |
| 521 | * 7. PCR set to allow clocking of individual functions |
| 522 | * |
| 523 | * Until we've done this, the only registers we can access are: |
| 524 | * SBI_SKCR |
| 525 | * SBI_SMCR |
| 526 | * SBI_SKID |
| 527 | */ |
| 528 | static void sa1111_wake(struct sa1111 *sachip) |
| 529 | { |
| 530 | unsigned long flags, r; |
| 531 | |
| 532 | spin_lock_irqsave(&sachip->lock, flags); |
| 533 | |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 534 | clk_enable(sachip->clk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
| 536 | /* |
| 537 | * Turn VCO on, and disable PLL Bypass. |
| 538 | */ |
| 539 | r = sa1111_readl(sachip->base + SA1111_SKCR); |
| 540 | r &= ~SKCR_VCO_OFF; |
| 541 | sa1111_writel(r, sachip->base + SA1111_SKCR); |
| 542 | r |= SKCR_PLL_BYPASS | SKCR_OE_EN; |
| 543 | sa1111_writel(r, sachip->base + SA1111_SKCR); |
| 544 | |
| 545 | /* |
| 546 | * Wait lock time. SA1111 manual _doesn't_ |
| 547 | * specify a figure for this! We choose 100us. |
| 548 | */ |
| 549 | udelay(100); |
| 550 | |
| 551 | /* |
| 552 | * Enable RCLK. We also ensure that RDYEN is set. |
| 553 | */ |
| 554 | r |= SKCR_RCLKEN | SKCR_RDYEN; |
| 555 | sa1111_writel(r, sachip->base + SA1111_SKCR); |
| 556 | |
| 557 | /* |
| 558 | * Wait 14 RCLK cycles for the chip to finish coming out |
| 559 | * of reset. (RCLK=24MHz). This is 590ns. |
| 560 | */ |
| 561 | udelay(1); |
| 562 | |
| 563 | /* |
| 564 | * Ensure all clocks are initially off. |
| 565 | */ |
| 566 | sa1111_writel(0, sachip->base + SA1111_SKPCR); |
| 567 | |
| 568 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 569 | } |
| 570 | |
| 571 | #ifdef CONFIG_ARCH_SA1100 |
| 572 | |
| 573 | static u32 sa1111_dma_mask[] = { |
| 574 | ~0, |
| 575 | ~(1 << 20), |
| 576 | ~(1 << 23), |
| 577 | ~(1 << 24), |
| 578 | ~(1 << 25), |
| 579 | ~(1 << 20), |
| 580 | ~(1 << 20), |
| 581 | 0, |
| 582 | }; |
| 583 | |
| 584 | /* |
| 585 | * Configure the SA1111 shared memory controller. |
| 586 | */ |
| 587 | void |
| 588 | sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac, |
| 589 | unsigned int cas_latency) |
| 590 | { |
| 591 | unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC); |
| 592 | |
| 593 | if (cas_latency == 3) |
| 594 | smcr |= SMCR_CLAT; |
| 595 | |
| 596 | sa1111_writel(smcr, sachip->base + SA1111_SMCR); |
| 597 | |
| 598 | /* |
| 599 | * Now clear the bits in the DMA mask to work around the SA1111 |
| 600 | * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion |
| 601 | * Chip Specification Update, June 2000, Erratum #7). |
| 602 | */ |
| 603 | if (sachip->dev->dma_mask) |
| 604 | *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2]; |
| 605 | |
| 606 | sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2]; |
| 607 | } |
Russell King | 0703ed2 | 2011-07-04 08:32:21 +0100 | [diff] [blame] | 608 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | static void sa1111_dev_release(struct device *_dev) |
| 611 | { |
| 612 | struct sa1111_dev *dev = SA1111_DEV(_dev); |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | kfree(dev); |
| 615 | } |
| 616 | |
| 617 | static int |
| 618 | sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent, |
| 619 | struct sa1111_dev_info *info) |
| 620 | { |
| 621 | struct sa1111_dev *dev; |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 622 | unsigned i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | int ret; |
| 624 | |
Russell King | d2a02b9 | 2006-03-20 19:46:41 +0000 | [diff] [blame] | 625 | dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | if (!dev) { |
| 627 | ret = -ENOMEM; |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 628 | goto err_alloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 631 | device_initialize(&dev->dev); |
Kay Sievers | 3f97870 | 2008-05-30 17:42:11 +0200 | [diff] [blame] | 632 | dev_set_name(&dev->dev, "%4.4lx", info->offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | dev->devid = info->devid; |
| 634 | dev->dev.parent = sachip->dev; |
| 635 | dev->dev.bus = &sa1111_bus_type; |
| 636 | dev->dev.release = sa1111_dev_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | dev->res.start = sachip->phys + info->offset; |
| 638 | dev->res.end = dev->res.start + 511; |
Kay Sievers | 3f97870 | 2008-05-30 17:42:11 +0200 | [diff] [blame] | 639 | dev->res.name = dev_name(&dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | dev->res.flags = IORESOURCE_MEM; |
| 641 | dev->mapbase = sachip->base + info->offset; |
| 642 | dev->skpcr_mask = info->skpcr_mask; |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 643 | |
| 644 | for (i = 0; i < ARRAY_SIZE(info->irq); i++) |
| 645 | dev->irq[i] = sachip->irq_base + info->irq[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 647 | /* |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 648 | * If the parent device has a DMA mask associated with it, and |
| 649 | * this child supports DMA, propagate it down to the children. |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 650 | */ |
Russell King | 21d1c77 | 2012-01-29 10:22:49 +0000 | [diff] [blame] | 651 | if (info->dma && sachip->dev->dma_mask) { |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 652 | dev->dma_mask = *sachip->dev->dma_mask; |
| 653 | dev->dev.dma_mask = &dev->dma_mask; |
| 654 | dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask; |
| 655 | } |
| 656 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | ret = request_resource(parent, &dev->res); |
| 658 | if (ret) { |
Russell King | 22eeaff | 2012-01-29 10:28:09 +0000 | [diff] [blame] | 659 | dev_err(sachip->dev, "failed to allocate resource for %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | dev->res.name); |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 661 | goto err_resource; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 664 | ret = device_add(&dev->dev); |
| 665 | if (ret) |
| 666 | goto err_add; |
| 667 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 669 | err_add: |
| 670 | release_resource(&dev->res); |
| 671 | err_resource: |
| 672 | put_device(&dev->dev); |
| 673 | err_alloc: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | return ret; |
| 675 | } |
| 676 | |
| 677 | /** |
| 678 | * sa1111_probe - probe for a single SA1111 chip. |
| 679 | * @phys_addr: physical address of device. |
| 680 | * |
| 681 | * Probe for a SA1111 chip. This must be called |
| 682 | * before any other SA1111-specific code. |
| 683 | * |
| 684 | * Returns: |
| 685 | * %-ENODEV device not found. |
| 686 | * %-EBUSY physical address already marked in-use. |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 687 | * %-EINVAL no platform data passed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | * %0 successful. |
| 689 | */ |
Greg Kroah-Hartman | 351a102 | 2012-12-21 14:02:24 -0800 | [diff] [blame] | 690 | static int __sa1111_probe(struct device *me, struct resource *mem, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | { |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 692 | struct sa1111_platform_data *pd = me->platform_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | struct sa1111 *sachip; |
| 694 | unsigned long id; |
David Brownell | 416112f | 2006-08-27 13:09:14 +0100 | [diff] [blame] | 695 | unsigned int has_devs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | int i, ret = -ENODEV; |
| 697 | |
Russell King | f03ecaa | 2012-01-16 00:09:22 +0000 | [diff] [blame] | 698 | if (!pd) |
| 699 | return -EINVAL; |
| 700 | |
Russell King | d2a02b9 | 2006-03-20 19:46:41 +0000 | [diff] [blame] | 701 | sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | if (!sachip) |
| 703 | return -ENOMEM; |
| 704 | |
Ian Molton | 13f7558 | 2008-07-08 10:32:50 +0100 | [diff] [blame] | 705 | sachip->clk = clk_get(me, "SA1111_CLK"); |
Julia Lawall | 442a902 | 2008-12-13 16:37:59 +0100 | [diff] [blame] | 706 | if (IS_ERR(sachip->clk)) { |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 707 | ret = PTR_ERR(sachip->clk); |
| 708 | goto err_free; |
| 709 | } |
| 710 | |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 711 | ret = clk_prepare(sachip->clk); |
| 712 | if (ret) |
| 713 | goto err_clkput; |
| 714 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | spin_lock_init(&sachip->lock); |
| 716 | |
| 717 | sachip->dev = me; |
| 718 | dev_set_drvdata(sachip->dev, sachip); |
| 719 | |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 720 | sachip->pdata = pd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | sachip->phys = mem->start; |
| 722 | sachip->irq = irq; |
| 723 | |
| 724 | /* |
| 725 | * Map the whole region. This also maps the |
| 726 | * registers for our children. |
| 727 | */ |
| 728 | sachip->base = ioremap(mem->start, PAGE_SIZE * 2); |
| 729 | if (!sachip->base) { |
| 730 | ret = -ENOMEM; |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 731 | goto err_clk_unprep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | /* |
| 735 | * Probe for the chip. Only touch the SBI registers. |
| 736 | */ |
| 737 | id = sa1111_readl(sachip->base + SA1111_SKID); |
| 738 | if ((id & SKID_ID_MASK) != SKID_SA1111_ID) { |
| 739 | printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id); |
| 740 | ret = -ENODEV; |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 741 | goto err_unmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | } |
| 743 | |
Russell King | 4ed89f2 | 2014-10-28 11:26:42 +0000 | [diff] [blame] | 744 | pr_info("SA1111 Microprocessor Companion Chip: silicon revision %lx, metal revision %lx\n", |
| 745 | (id & SKID_SIREV_MASK) >> 4, id & SKID_MTREV_MASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
| 747 | /* |
| 748 | * We found it. Wake the chip up, and initialise. |
| 749 | */ |
| 750 | sa1111_wake(sachip); |
| 751 | |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 752 | /* |
| 753 | * The interrupt controller must be initialised before any |
| 754 | * other device to ensure that the interrupts are available. |
| 755 | */ |
| 756 | if (sachip->irq != NO_IRQ) { |
| 757 | ret = sa1111_setup_irq(sachip, pd->irq_base); |
| 758 | if (ret) |
| 759 | goto err_unmap; |
| 760 | } |
| 761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | #ifdef CONFIG_ARCH_SA1100 |
David Brownell | 416112f | 2006-08-27 13:09:14 +0100 | [diff] [blame] | 763 | { |
| 764 | unsigned int val; |
| 765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | /* |
| 767 | * The SDRAM configuration of the SA1110 and the SA1111 must |
| 768 | * match. This is very important to ensure that SA1111 accesses |
| 769 | * don't corrupt the SDRAM. Note that this ungates the SA1111's |
| 770 | * MBGNT signal, so we must have called sa1110_mb_disable() |
| 771 | * beforehand. |
| 772 | */ |
| 773 | sa1111_configure_smc(sachip, 1, |
| 774 | FExtr(MDCNFG, MDCNFG_SA1110_DRAC0), |
| 775 | FExtr(MDCNFG, MDCNFG_SA1110_TDL0)); |
| 776 | |
| 777 | /* |
| 778 | * We only need to turn on DCLK whenever we want to use the |
| 779 | * DMA. It can otherwise be held firmly in the off position. |
| 780 | * (currently, we always enable it.) |
| 781 | */ |
| 782 | val = sa1111_readl(sachip->base + SA1111_SKPCR); |
| 783 | sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR); |
| 784 | |
| 785 | /* |
| 786 | * Enable the SA1110 memory bus request and grant signals. |
| 787 | */ |
| 788 | sa1110_mb_enable(); |
David Brownell | 416112f | 2006-08-27 13:09:14 +0100 | [diff] [blame] | 789 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | #endif |
| 791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | g_sa1111 = sachip; |
| 793 | |
| 794 | has_devs = ~0; |
Russell King | 07be45f | 2012-01-26 13:34:21 +0000 | [diff] [blame] | 795 | if (pd) |
| 796 | has_devs &= ~pd->disable_devs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
| 798 | for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++) |
Russell King | e5c0fc4 | 2012-01-25 10:42:52 +0000 | [diff] [blame] | 799 | if (sa1111_devices[i].devid & has_devs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | sa1111_init_one_child(sachip, mem, &sa1111_devices[i]); |
| 801 | |
| 802 | return 0; |
| 803 | |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 804 | err_unmap: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | iounmap(sachip->base); |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 806 | err_clk_unprep: |
| 807 | clk_unprepare(sachip->clk); |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 808 | err_clkput: |
| 809 | clk_put(sachip->clk); |
| 810 | err_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | kfree(sachip); |
| 812 | return ret; |
| 813 | } |
| 814 | |
Russell King | 522c37b | 2005-06-22 09:52:26 +0100 | [diff] [blame] | 815 | static int sa1111_remove_one(struct device *dev, void *data) |
| 816 | { |
Russell King | 924e1d4 | 2012-01-29 10:20:00 +0000 | [diff] [blame] | 817 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 818 | device_del(&sadev->dev); |
| 819 | release_resource(&sadev->res); |
| 820 | put_device(&sadev->dev); |
Russell King | 522c37b | 2005-06-22 09:52:26 +0100 | [diff] [blame] | 821 | return 0; |
| 822 | } |
| 823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | static void __sa1111_remove(struct sa1111 *sachip) |
| 825 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | void __iomem *irqbase = sachip->base + SA1111_INTC; |
| 827 | |
Russell King | 522c37b | 2005-06-22 09:52:26 +0100 | [diff] [blame] | 828 | device_for_each_child(sachip->dev, NULL, sa1111_remove_one); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
| 830 | /* disable all IRQs */ |
| 831 | sa1111_writel(0, irqbase + SA1111_INTEN0); |
| 832 | sa1111_writel(0, irqbase + SA1111_INTEN1); |
| 833 | sa1111_writel(0, irqbase + SA1111_WAKEEN0); |
| 834 | sa1111_writel(0, irqbase + SA1111_WAKEEN1); |
| 835 | |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 836 | clk_disable(sachip->clk); |
Russell King | 72ae00c | 2011-09-22 11:41:07 +0100 | [diff] [blame] | 837 | clk_unprepare(sachip->clk); |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | if (sachip->irq != NO_IRQ) { |
Russell King | 056c0ac | 2015-06-16 23:06:25 +0100 | [diff] [blame] | 840 | irq_set_chained_handler_and_data(sachip->irq, NULL, NULL); |
Russell King | 36d3121 | 2012-01-24 21:25:20 +0000 | [diff] [blame] | 841 | irq_free_descs(sachip->irq_base, SA1111_IRQ_NR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
| 843 | release_mem_region(sachip->phys + SA1111_INTC, 512); |
| 844 | } |
| 845 | |
| 846 | iounmap(sachip->base); |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 847 | clk_put(sachip->clk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | kfree(sachip); |
| 849 | } |
| 850 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | struct sa1111_save_data { |
| 852 | unsigned int skcr; |
| 853 | unsigned int skpcr; |
| 854 | unsigned int skcdr; |
| 855 | unsigned char skaud; |
| 856 | unsigned char skpwm0; |
| 857 | unsigned char skpwm1; |
| 858 | |
| 859 | /* |
| 860 | * Interrupt controller |
| 861 | */ |
| 862 | unsigned int intpol0; |
| 863 | unsigned int intpol1; |
| 864 | unsigned int inten0; |
| 865 | unsigned int inten1; |
| 866 | unsigned int wakepol0; |
| 867 | unsigned int wakepol1; |
| 868 | unsigned int wakeen0; |
| 869 | unsigned int wakeen1; |
| 870 | }; |
| 871 | |
| 872 | #ifdef CONFIG_PM |
| 873 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 874 | static int sa1111_suspend(struct platform_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 876 | struct sa1111 *sachip = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | struct sa1111_save_data *save; |
| 878 | unsigned long flags; |
| 879 | unsigned int val; |
| 880 | void __iomem *base; |
| 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL); |
| 883 | if (!save) |
| 884 | return -ENOMEM; |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 885 | sachip->saved_state = save; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | spin_lock_irqsave(&sachip->lock, flags); |
| 888 | |
| 889 | /* |
| 890 | * Save state. |
| 891 | */ |
| 892 | base = sachip->base; |
| 893 | save->skcr = sa1111_readl(base + SA1111_SKCR); |
| 894 | save->skpcr = sa1111_readl(base + SA1111_SKPCR); |
| 895 | save->skcdr = sa1111_readl(base + SA1111_SKCDR); |
| 896 | save->skaud = sa1111_readl(base + SA1111_SKAUD); |
| 897 | save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0); |
| 898 | save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1); |
| 899 | |
Russell King | a22db0f3 | 2012-02-03 19:05:13 +0000 | [diff] [blame] | 900 | sa1111_writel(0, sachip->base + SA1111_SKPWM0); |
| 901 | sa1111_writel(0, sachip->base + SA1111_SKPWM1); |
| 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | base = sachip->base + SA1111_INTC; |
| 904 | save->intpol0 = sa1111_readl(base + SA1111_INTPOL0); |
| 905 | save->intpol1 = sa1111_readl(base + SA1111_INTPOL1); |
| 906 | save->inten0 = sa1111_readl(base + SA1111_INTEN0); |
| 907 | save->inten1 = sa1111_readl(base + SA1111_INTEN1); |
| 908 | save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0); |
| 909 | save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1); |
| 910 | save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0); |
| 911 | save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1); |
| 912 | |
| 913 | /* |
| 914 | * Disable. |
| 915 | */ |
| 916 | val = sa1111_readl(sachip->base + SA1111_SKCR); |
| 917 | sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Russell King | 97d654f | 2006-03-15 15:54:37 +0000 | [diff] [blame] | 919 | clk_disable(sachip->clk); |
| 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 922 | |
Russell King | 29c140b | 2012-02-03 19:03:31 +0000 | [diff] [blame] | 923 | #ifdef CONFIG_ARCH_SA1100 |
| 924 | sa1110_mb_disable(); |
| 925 | #endif |
| 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | return 0; |
| 928 | } |
| 929 | |
| 930 | /* |
| 931 | * sa1111_resume - Restore the SA1111 device state. |
| 932 | * @dev: device to restore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | * |
| 934 | * Restore the general state of the SA1111; clock control and |
| 935 | * interrupt controller. Other parts of the SA1111 must be |
| 936 | * restored by their respective drivers, and must be called |
| 937 | * via LDM after this function. |
| 938 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 939 | static int sa1111_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 941 | struct sa1111 *sachip = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | struct sa1111_save_data *save; |
| 943 | unsigned long flags, id; |
| 944 | void __iomem *base; |
| 945 | |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 946 | save = sachip->saved_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | if (!save) |
| 948 | return 0; |
| 949 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | /* |
| 951 | * Ensure that the SA1111 is still here. |
| 952 | * FIXME: shouldn't do this here. |
| 953 | */ |
| 954 | id = sa1111_readl(sachip->base + SA1111_SKID); |
| 955 | if ((id & SKID_ID_MASK) != SKID_SA1111_ID) { |
| 956 | __sa1111_remove(sachip); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 957 | platform_set_drvdata(dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | kfree(save); |
| 959 | return 0; |
| 960 | } |
| 961 | |
| 962 | /* |
| 963 | * First of all, wake up the chip. |
| 964 | */ |
| 965 | sa1111_wake(sachip); |
Marek Vašut | 3defb24 | 2010-05-26 23:53:09 +0100 | [diff] [blame] | 966 | |
Russell King | 29c140b | 2012-02-03 19:03:31 +0000 | [diff] [blame] | 967 | #ifdef CONFIG_ARCH_SA1100 |
| 968 | /* Enable the memory bus request/grant signals */ |
| 969 | sa1110_mb_enable(); |
| 970 | #endif |
| 971 | |
Marek Vašut | 3defb24 | 2010-05-26 23:53:09 +0100 | [diff] [blame] | 972 | /* |
| 973 | * Only lock for write ops. Also, sa1111_wake must be called with |
| 974 | * released spinlock! |
| 975 | */ |
| 976 | spin_lock_irqsave(&sachip->lock, flags); |
| 977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0); |
| 979 | sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1); |
| 980 | |
| 981 | base = sachip->base; |
| 982 | sa1111_writel(save->skcr, base + SA1111_SKCR); |
| 983 | sa1111_writel(save->skpcr, base + SA1111_SKPCR); |
| 984 | sa1111_writel(save->skcdr, base + SA1111_SKCDR); |
| 985 | sa1111_writel(save->skaud, base + SA1111_SKAUD); |
| 986 | sa1111_writel(save->skpwm0, base + SA1111_SKPWM0); |
| 987 | sa1111_writel(save->skpwm1, base + SA1111_SKPWM1); |
| 988 | |
| 989 | base = sachip->base + SA1111_INTC; |
| 990 | sa1111_writel(save->intpol0, base + SA1111_INTPOL0); |
| 991 | sa1111_writel(save->intpol1, base + SA1111_INTPOL1); |
| 992 | sa1111_writel(save->inten0, base + SA1111_INTEN0); |
| 993 | sa1111_writel(save->inten1, base + SA1111_INTEN1); |
| 994 | sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0); |
| 995 | sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1); |
| 996 | sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0); |
| 997 | sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1); |
| 998 | |
| 999 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1000 | |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 1001 | sachip->saved_state = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | kfree(save); |
| 1003 | |
| 1004 | return 0; |
| 1005 | } |
| 1006 | |
| 1007 | #else |
| 1008 | #define sa1111_suspend NULL |
| 1009 | #define sa1111_resume NULL |
| 1010 | #endif |
| 1011 | |
Greg Kroah-Hartman | 351a102 | 2012-12-21 14:02:24 -0800 | [diff] [blame] | 1012 | static int sa1111_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | struct resource *mem; |
| 1015 | int irq; |
| 1016 | |
| 1017 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1018 | if (!mem) |
| 1019 | return -EINVAL; |
| 1020 | irq = platform_get_irq(pdev, 0); |
David Vrabel | 4894473 | 2006-01-19 17:56:29 +0000 | [diff] [blame] | 1021 | if (irq < 0) |
| 1022 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1024 | return __sa1111_probe(&pdev->dev, mem, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | } |
| 1026 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1027 | static int sa1111_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1029 | struct sa1111 *sachip = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | |
| 1031 | if (sachip) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | #ifdef CONFIG_PM |
Rafael J. Wysocki | 93160c6 | 2007-07-09 11:39:19 -0700 | [diff] [blame] | 1033 | kfree(sachip->saved_state); |
| 1034 | sachip->saved_state = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | #endif |
Julia Lawall | f2d2420 | 2010-07-30 17:17:28 +0200 | [diff] [blame] | 1036 | __sa1111_remove(sachip); |
| 1037 | platform_set_drvdata(pdev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
| 1039 | |
| 1040 | return 0; |
| 1041 | } |
| 1042 | |
| 1043 | /* |
| 1044 | * Not sure if this should be on the system bus or not yet. |
| 1045 | * We really want some way to register a system device at |
| 1046 | * the per-machine level, and then have this driver pick |
| 1047 | * up the registered devices. |
| 1048 | * |
| 1049 | * We also need to handle the SDRAM configuration for |
| 1050 | * PXA250/SA1110 machine classes. |
| 1051 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1052 | static struct platform_driver sa1111_device_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | .probe = sa1111_probe, |
| 1054 | .remove = sa1111_remove, |
| 1055 | .suspend = sa1111_suspend, |
| 1056 | .resume = sa1111_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1057 | .driver = { |
| 1058 | .name = "sa1111", |
| 1059 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | }; |
| 1061 | |
| 1062 | /* |
| 1063 | * Get the parent device driver (us) structure |
| 1064 | * from a child function device |
| 1065 | */ |
| 1066 | static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev) |
| 1067 | { |
| 1068 | return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent); |
| 1069 | } |
| 1070 | |
| 1071 | /* |
| 1072 | * The bits in the opdiv field are non-linear. |
| 1073 | */ |
| 1074 | static unsigned char opdiv_table[] = { 1, 4, 2, 8 }; |
| 1075 | |
| 1076 | static unsigned int __sa1111_pll_clock(struct sa1111 *sachip) |
| 1077 | { |
| 1078 | unsigned int skcdr, fbdiv, ipdiv, opdiv; |
| 1079 | |
| 1080 | skcdr = sa1111_readl(sachip->base + SA1111_SKCDR); |
| 1081 | |
| 1082 | fbdiv = (skcdr & 0x007f) + 2; |
| 1083 | ipdiv = ((skcdr & 0x0f80) >> 7) + 2; |
| 1084 | opdiv = opdiv_table[(skcdr & 0x3000) >> 12]; |
| 1085 | |
| 1086 | return 3686400 * fbdiv / (ipdiv * opdiv); |
| 1087 | } |
| 1088 | |
| 1089 | /** |
| 1090 | * sa1111_pll_clock - return the current PLL clock frequency. |
| 1091 | * @sadev: SA1111 function block |
| 1092 | * |
| 1093 | * BUG: we should look at SKCR. We also blindly believe that |
| 1094 | * the chip is being fed with the 3.6864MHz clock. |
| 1095 | * |
| 1096 | * Returns the PLL clock in Hz. |
| 1097 | */ |
| 1098 | unsigned int sa1111_pll_clock(struct sa1111_dev *sadev) |
| 1099 | { |
| 1100 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1101 | |
| 1102 | return __sa1111_pll_clock(sachip); |
| 1103 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1104 | EXPORT_SYMBOL(sa1111_pll_clock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | |
| 1106 | /** |
| 1107 | * sa1111_select_audio_mode - select I2S or AC link mode |
| 1108 | * @sadev: SA1111 function block |
| 1109 | * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S |
| 1110 | * |
| 1111 | * Frob the SKCR to select AC Link mode or I2S mode for |
| 1112 | * the audio block. |
| 1113 | */ |
| 1114 | void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode) |
| 1115 | { |
| 1116 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1117 | unsigned long flags; |
| 1118 | unsigned int val; |
| 1119 | |
| 1120 | spin_lock_irqsave(&sachip->lock, flags); |
| 1121 | |
| 1122 | val = sa1111_readl(sachip->base + SA1111_SKCR); |
| 1123 | if (mode == SA1111_AUDIO_I2S) { |
| 1124 | val &= ~SKCR_SELAC; |
| 1125 | } else { |
| 1126 | val |= SKCR_SELAC; |
| 1127 | } |
| 1128 | sa1111_writel(val, sachip->base + SA1111_SKCR); |
| 1129 | |
| 1130 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1131 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1132 | EXPORT_SYMBOL(sa1111_select_audio_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
| 1134 | /** |
| 1135 | * sa1111_set_audio_rate - set the audio sample rate |
| 1136 | * @sadev: SA1111 SAC function block |
| 1137 | * @rate: sample rate to select |
| 1138 | */ |
| 1139 | int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate) |
| 1140 | { |
| 1141 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1142 | unsigned int div; |
| 1143 | |
| 1144 | if (sadev->devid != SA1111_DEVID_SAC) |
| 1145 | return -EINVAL; |
| 1146 | |
| 1147 | div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate; |
| 1148 | if (div == 0) |
| 1149 | div = 1; |
| 1150 | if (div > 128) |
| 1151 | div = 128; |
| 1152 | |
| 1153 | sa1111_writel(div - 1, sachip->base + SA1111_SKAUD); |
| 1154 | |
| 1155 | return 0; |
| 1156 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1157 | EXPORT_SYMBOL(sa1111_set_audio_rate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
| 1159 | /** |
| 1160 | * sa1111_get_audio_rate - get the audio sample rate |
| 1161 | * @sadev: SA1111 SAC function block device |
| 1162 | */ |
| 1163 | int sa1111_get_audio_rate(struct sa1111_dev *sadev) |
| 1164 | { |
| 1165 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1166 | unsigned long div; |
| 1167 | |
| 1168 | if (sadev->devid != SA1111_DEVID_SAC) |
| 1169 | return -EINVAL; |
| 1170 | |
| 1171 | div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1; |
| 1172 | |
| 1173 | return __sa1111_pll_clock(sachip) / (256 * div); |
| 1174 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1175 | EXPORT_SYMBOL(sa1111_get_audio_rate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | |
| 1177 | void sa1111_set_io_dir(struct sa1111_dev *sadev, |
| 1178 | unsigned int bits, unsigned int dir, |
| 1179 | unsigned int sleep_dir) |
| 1180 | { |
| 1181 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1182 | unsigned long flags; |
| 1183 | unsigned int val; |
| 1184 | void __iomem *gpio = sachip->base + SA1111_GPIO; |
| 1185 | |
| 1186 | #define MODIFY_BITS(port, mask, dir) \ |
| 1187 | if (mask) { \ |
| 1188 | val = sa1111_readl(port); \ |
| 1189 | val &= ~(mask); \ |
| 1190 | val |= (dir) & (mask); \ |
| 1191 | sa1111_writel(val, port); \ |
| 1192 | } |
| 1193 | |
| 1194 | spin_lock_irqsave(&sachip->lock, flags); |
| 1195 | MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir); |
| 1196 | MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8); |
| 1197 | MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16); |
| 1198 | |
| 1199 | MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir); |
| 1200 | MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8); |
| 1201 | MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16); |
| 1202 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1203 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1204 | EXPORT_SYMBOL(sa1111_set_io_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | |
| 1206 | void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v) |
| 1207 | { |
| 1208 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1209 | unsigned long flags; |
| 1210 | unsigned int val; |
| 1211 | void __iomem *gpio = sachip->base + SA1111_GPIO; |
| 1212 | |
| 1213 | spin_lock_irqsave(&sachip->lock, flags); |
| 1214 | MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v); |
| 1215 | MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8); |
| 1216 | MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16); |
| 1217 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1218 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1219 | EXPORT_SYMBOL(sa1111_set_io); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | |
| 1221 | void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v) |
| 1222 | { |
| 1223 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1224 | unsigned long flags; |
| 1225 | unsigned int val; |
| 1226 | void __iomem *gpio = sachip->base + SA1111_GPIO; |
| 1227 | |
| 1228 | spin_lock_irqsave(&sachip->lock, flags); |
| 1229 | MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v); |
| 1230 | MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8); |
| 1231 | MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16); |
| 1232 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1233 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1234 | EXPORT_SYMBOL(sa1111_set_sleep_io); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | |
| 1236 | /* |
| 1237 | * Individual device operations. |
| 1238 | */ |
| 1239 | |
| 1240 | /** |
| 1241 | * sa1111_enable_device - enable an on-chip SA1111 function block |
| 1242 | * @sadev: SA1111 function block device to enable |
| 1243 | */ |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1244 | int sa1111_enable_device(struct sa1111_dev *sadev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | { |
| 1246 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1247 | unsigned long flags; |
| 1248 | unsigned int val; |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1249 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1251 | if (sachip->pdata && sachip->pdata->enable) |
| 1252 | ret = sachip->pdata->enable(sachip->pdata->data, sadev->devid); |
| 1253 | |
| 1254 | if (ret == 0) { |
| 1255 | spin_lock_irqsave(&sachip->lock, flags); |
| 1256 | val = sa1111_readl(sachip->base + SA1111_SKPCR); |
| 1257 | sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR); |
| 1258 | spin_unlock_irqrestore(&sachip->lock, flags); |
| 1259 | } |
| 1260 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1262 | EXPORT_SYMBOL(sa1111_enable_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | |
| 1264 | /** |
| 1265 | * sa1111_disable_device - disable an on-chip SA1111 function block |
| 1266 | * @sadev: SA1111 function block device to disable |
| 1267 | */ |
| 1268 | void sa1111_disable_device(struct sa1111_dev *sadev) |
| 1269 | { |
| 1270 | struct sa1111 *sachip = sa1111_chip_driver(sadev); |
| 1271 | unsigned long flags; |
| 1272 | unsigned int val; |
| 1273 | |
| 1274 | spin_lock_irqsave(&sachip->lock, flags); |
| 1275 | val = sa1111_readl(sachip->base + SA1111_SKPCR); |
| 1276 | sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR); |
| 1277 | spin_unlock_irqrestore(&sachip->lock, flags); |
Russell King | ae99ddb | 2012-01-26 13:25:47 +0000 | [diff] [blame] | 1278 | |
| 1279 | if (sachip->pdata && sachip->pdata->disable) |
| 1280 | sachip->pdata->disable(sachip->pdata->data, sadev->devid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1282 | EXPORT_SYMBOL(sa1111_disable_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | |
| 1284 | /* |
| 1285 | * SA1111 "Register Access Bus." |
| 1286 | * |
| 1287 | * We model this as a regular bus type, and hang devices directly |
| 1288 | * off this. |
| 1289 | */ |
| 1290 | static int sa1111_match(struct device *_dev, struct device_driver *_drv) |
| 1291 | { |
| 1292 | struct sa1111_dev *dev = SA1111_DEV(_dev); |
| 1293 | struct sa1111_driver *drv = SA1111_DRV(_drv); |
| 1294 | |
Russell King | e5c0fc4 | 2012-01-25 10:42:52 +0000 | [diff] [blame] | 1295 | return dev->devid & drv->devid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | static int sa1111_bus_suspend(struct device *dev, pm_message_t state) |
| 1299 | { |
| 1300 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1301 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1302 | int ret = 0; |
| 1303 | |
| 1304 | if (drv && drv->suspend) |
| 1305 | ret = drv->suspend(sadev, state); |
| 1306 | return ret; |
| 1307 | } |
| 1308 | |
| 1309 | static int sa1111_bus_resume(struct device *dev) |
| 1310 | { |
| 1311 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1312 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1313 | int ret = 0; |
| 1314 | |
| 1315 | if (drv && drv->resume) |
| 1316 | ret = drv->resume(sadev); |
| 1317 | return ret; |
| 1318 | } |
| 1319 | |
Russell King | 6bd72f0 | 2012-01-26 11:01:18 +0000 | [diff] [blame] | 1320 | static void sa1111_bus_shutdown(struct device *dev) |
| 1321 | { |
| 1322 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1323 | |
| 1324 | if (drv && drv->shutdown) |
| 1325 | drv->shutdown(SA1111_DEV(dev)); |
| 1326 | } |
| 1327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | static int sa1111_bus_probe(struct device *dev) |
| 1329 | { |
| 1330 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1331 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1332 | int ret = -ENODEV; |
| 1333 | |
| 1334 | if (drv->probe) |
| 1335 | ret = drv->probe(sadev); |
| 1336 | return ret; |
| 1337 | } |
| 1338 | |
| 1339 | static int sa1111_bus_remove(struct device *dev) |
| 1340 | { |
| 1341 | struct sa1111_dev *sadev = SA1111_DEV(dev); |
| 1342 | struct sa1111_driver *drv = SA1111_DRV(dev->driver); |
| 1343 | int ret = 0; |
| 1344 | |
| 1345 | if (drv->remove) |
| 1346 | ret = drv->remove(sadev); |
| 1347 | return ret; |
| 1348 | } |
| 1349 | |
| 1350 | struct bus_type sa1111_bus_type = { |
| 1351 | .name = "sa1111-rab", |
| 1352 | .match = sa1111_match, |
Russell King | 2876ba4 | 2006-01-05 14:32:32 +0000 | [diff] [blame] | 1353 | .probe = sa1111_bus_probe, |
| 1354 | .remove = sa1111_bus_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | .suspend = sa1111_bus_suspend, |
| 1356 | .resume = sa1111_bus_resume, |
Russell King | 6bd72f0 | 2012-01-26 11:01:18 +0000 | [diff] [blame] | 1357 | .shutdown = sa1111_bus_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | }; |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1359 | EXPORT_SYMBOL(sa1111_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
| 1361 | int sa1111_driver_register(struct sa1111_driver *driver) |
| 1362 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | driver->drv.bus = &sa1111_bus_type; |
| 1364 | return driver_register(&driver->drv); |
| 1365 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1366 | EXPORT_SYMBOL(sa1111_driver_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
| 1368 | void sa1111_driver_unregister(struct sa1111_driver *driver) |
| 1369 | { |
| 1370 | driver_unregister(&driver->drv); |
| 1371 | } |
Hartley Sweeten | 0a4bc5e | 2009-09-29 23:49:02 +0100 | [diff] [blame] | 1372 | EXPORT_SYMBOL(sa1111_driver_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 1374 | #ifdef CONFIG_DMABOUNCE |
| 1375 | /* |
| 1376 | * According to the "Intel StrongARM SA-1111 Microprocessor Companion |
| 1377 | * Chip Specification Update" (June 2000), erratum #7, there is a |
| 1378 | * significant bug in the SA1111 SDRAM shared memory controller. If |
| 1379 | * an access to a region of memory above 1MB relative to the bank base, |
| 1380 | * it is important that address bit 10 _NOT_ be asserted. Depending |
| 1381 | * on the configuration of the RAM, bit 10 may correspond to one |
| 1382 | * of several different (processor-relative) address bits. |
| 1383 | * |
| 1384 | * This routine only identifies whether or not a given DMA address |
| 1385 | * is susceptible to the bug. |
| 1386 | * |
| 1387 | * This should only get called for sa1111_device types due to the |
| 1388 | * way we configure our device dma_masks. |
| 1389 | */ |
| 1390 | static int sa1111_needs_bounce(struct device *dev, dma_addr_t addr, size_t size) |
| 1391 | { |
| 1392 | /* |
| 1393 | * Section 4.6 of the "Intel StrongARM SA-1111 Development Module |
| 1394 | * User's Guide" mentions that jumpers R51 and R52 control the |
| 1395 | * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or |
| 1396 | * SDRAM bank 1 on Neponset). The default configuration selects |
| 1397 | * Assabet, so any address in bank 1 is necessarily invalid. |
| 1398 | */ |
| 1399 | return (machine_is_assabet() || machine_is_pfs168()) && |
| 1400 | (addr >= 0xc8000000 || (addr + size) >= 0xc8000000); |
| 1401 | } |
| 1402 | |
| 1403 | static int sa1111_notifier_call(struct notifier_block *n, unsigned long action, |
| 1404 | void *data) |
| 1405 | { |
| 1406 | struct sa1111_dev *dev = SA1111_DEV(data); |
| 1407 | |
| 1408 | switch (action) { |
| 1409 | case BUS_NOTIFY_ADD_DEVICE: |
| 1410 | if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) { |
| 1411 | int ret = dmabounce_register_dev(&dev->dev, 1024, 4096, |
| 1412 | sa1111_needs_bounce); |
| 1413 | if (ret) |
| 1414 | dev_err(&dev->dev, "failed to register with dmabounce: %d\n", ret); |
| 1415 | } |
| 1416 | break; |
| 1417 | |
| 1418 | case BUS_NOTIFY_DEL_DEVICE: |
| 1419 | if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) |
| 1420 | dmabounce_unregister_dev(&dev->dev); |
| 1421 | break; |
| 1422 | } |
| 1423 | return NOTIFY_OK; |
| 1424 | } |
| 1425 | |
| 1426 | static struct notifier_block sa1111_bus_notifier = { |
| 1427 | .notifier_call = sa1111_notifier_call, |
| 1428 | }; |
| 1429 | #endif |
| 1430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | static int __init sa1111_init(void) |
| 1432 | { |
| 1433 | int ret = bus_register(&sa1111_bus_type); |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 1434 | #ifdef CONFIG_DMABOUNCE |
| 1435 | if (ret == 0) |
| 1436 | bus_register_notifier(&sa1111_bus_type, &sa1111_bus_notifier); |
| 1437 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | if (ret == 0) |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1439 | platform_driver_register(&sa1111_device_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | return ret; |
| 1441 | } |
| 1442 | |
| 1443 | static void __exit sa1111_exit(void) |
| 1444 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1445 | platform_driver_unregister(&sa1111_device_driver); |
Russell King | 09a2ba2 | 2012-01-29 09:31:31 +0000 | [diff] [blame] | 1446 | #ifdef CONFIG_DMABOUNCE |
| 1447 | bus_unregister_notifier(&sa1111_bus_type, &sa1111_bus_notifier); |
| 1448 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | bus_unregister(&sa1111_bus_type); |
| 1450 | } |
| 1451 | |
Russell King | 7272438 | 2005-11-15 19:04:22 +0000 | [diff] [blame] | 1452 | subsys_initcall(sa1111_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | module_exit(sa1111_exit); |
| 1454 | |
| 1455 | MODULE_DESCRIPTION("Intel Corporation SA1111 core driver"); |
| 1456 | MODULE_LICENSE("GPL"); |