Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/plat-omap/mcbsp.c |
| 3 | * |
| 4 | * Copyright (C) 2004 Nokia Corporation |
| 5 | * Author: Samuel Ortiz <samuel.ortiz@nokia.com> |
| 6 | * |
| 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 | * Multichannel mode not supported. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/device.h> |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 18 | #include <linux/platform_device.h> |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 19 | #include <linux/wait.h> |
| 20 | #include <linux/completion.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/err.h> |
Russell King | f8ce254 | 2006-01-07 16:15:52 +0000 | [diff] [blame] | 23 | #include <linux/clk.h> |
Tony Lindgren | 04fbf6a | 2007-02-12 10:50:53 -0800 | [diff] [blame] | 24 | #include <linux/delay.h> |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 25 | #include <linux/io.h> |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 26 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 27 | #include <mach/dma.h> |
| 28 | #include <mach/mcbsp.h> |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 29 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 30 | struct omap_mcbsp **mcbsp_ptr; |
| 31 | int omap_mcbsp_count; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 32 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 33 | void omap_mcbsp_write(void __iomem *io_base, u16 reg, u32 val) |
| 34 | { |
| 35 | if (cpu_class_is_omap1() || cpu_is_omap2420()) |
| 36 | __raw_writew((u16)val, io_base + reg); |
| 37 | else |
| 38 | __raw_writel(val, io_base + reg); |
| 39 | } |
| 40 | |
| 41 | int omap_mcbsp_read(void __iomem *io_base, u16 reg) |
| 42 | { |
| 43 | if (cpu_class_is_omap1() || cpu_is_omap2420()) |
| 44 | return __raw_readw(io_base + reg); |
| 45 | else |
| 46 | return __raw_readl(io_base + reg); |
| 47 | } |
| 48 | |
| 49 | #define OMAP_MCBSP_READ(base, reg) \ |
| 50 | omap_mcbsp_read(base, OMAP_MCBSP_REG_##reg) |
| 51 | #define OMAP_MCBSP_WRITE(base, reg, val) \ |
| 52 | omap_mcbsp_write(base, OMAP_MCBSP_REG_##reg, val) |
| 53 | |
| 54 | #define omap_mcbsp_check_valid_id(id) (id < omap_mcbsp_count) |
| 55 | #define id_to_mcbsp_ptr(id) mcbsp_ptr[id]; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 56 | |
| 57 | static void omap_mcbsp_dump_reg(u8 id) |
| 58 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 59 | struct omap_mcbsp *mcbsp = id_to_mcbsp_ptr(id); |
| 60 | |
| 61 | dev_dbg(mcbsp->dev, "**** McBSP%d regs ****\n", mcbsp->id); |
| 62 | dev_dbg(mcbsp->dev, "DRR2: 0x%04x\n", |
| 63 | OMAP_MCBSP_READ(mcbsp->io_base, DRR2)); |
| 64 | dev_dbg(mcbsp->dev, "DRR1: 0x%04x\n", |
| 65 | OMAP_MCBSP_READ(mcbsp->io_base, DRR1)); |
| 66 | dev_dbg(mcbsp->dev, "DXR2: 0x%04x\n", |
| 67 | OMAP_MCBSP_READ(mcbsp->io_base, DXR2)); |
| 68 | dev_dbg(mcbsp->dev, "DXR1: 0x%04x\n", |
| 69 | OMAP_MCBSP_READ(mcbsp->io_base, DXR1)); |
| 70 | dev_dbg(mcbsp->dev, "SPCR2: 0x%04x\n", |
| 71 | OMAP_MCBSP_READ(mcbsp->io_base, SPCR2)); |
| 72 | dev_dbg(mcbsp->dev, "SPCR1: 0x%04x\n", |
| 73 | OMAP_MCBSP_READ(mcbsp->io_base, SPCR1)); |
| 74 | dev_dbg(mcbsp->dev, "RCR2: 0x%04x\n", |
| 75 | OMAP_MCBSP_READ(mcbsp->io_base, RCR2)); |
| 76 | dev_dbg(mcbsp->dev, "RCR1: 0x%04x\n", |
| 77 | OMAP_MCBSP_READ(mcbsp->io_base, RCR1)); |
| 78 | dev_dbg(mcbsp->dev, "XCR2: 0x%04x\n", |
| 79 | OMAP_MCBSP_READ(mcbsp->io_base, XCR2)); |
| 80 | dev_dbg(mcbsp->dev, "XCR1: 0x%04x\n", |
| 81 | OMAP_MCBSP_READ(mcbsp->io_base, XCR1)); |
| 82 | dev_dbg(mcbsp->dev, "SRGR2: 0x%04x\n", |
| 83 | OMAP_MCBSP_READ(mcbsp->io_base, SRGR2)); |
| 84 | dev_dbg(mcbsp->dev, "SRGR1: 0x%04x\n", |
| 85 | OMAP_MCBSP_READ(mcbsp->io_base, SRGR1)); |
| 86 | dev_dbg(mcbsp->dev, "PCR0: 0x%04x\n", |
| 87 | OMAP_MCBSP_READ(mcbsp->io_base, PCR0)); |
| 88 | dev_dbg(mcbsp->dev, "***********************\n"); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 89 | } |
| 90 | |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 91 | static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 92 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 93 | struct omap_mcbsp *mcbsp_tx = dev_id; |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 94 | u16 irqst_spcr2; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 95 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 96 | irqst_spcr2 = OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2); |
| 97 | dev_dbg(mcbsp_tx->dev, "TX IRQ callback : 0x%x\n", irqst_spcr2); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 98 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 99 | if (irqst_spcr2 & XSYNC_ERR) { |
| 100 | dev_err(mcbsp_tx->dev, "TX Frame Sync Error! : 0x%x\n", |
| 101 | irqst_spcr2); |
| 102 | /* Writing zero to XSYNC_ERR clears the IRQ */ |
| 103 | OMAP_MCBSP_WRITE(mcbsp_tx->io_base, SPCR2, |
| 104 | irqst_spcr2 & ~(XSYNC_ERR)); |
| 105 | } else { |
| 106 | complete(&mcbsp_tx->tx_irq_completion); |
| 107 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 108 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 109 | return IRQ_HANDLED; |
| 110 | } |
| 111 | |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 112 | static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 113 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 114 | struct omap_mcbsp *mcbsp_rx = dev_id; |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 115 | u16 irqst_spcr1; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 116 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 117 | irqst_spcr1 = OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR1); |
| 118 | dev_dbg(mcbsp_rx->dev, "RX IRQ callback : 0x%x\n", irqst_spcr1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 119 | |
Eero Nurkkala | d6d834b | 2009-05-25 11:08:42 -0700 | [diff] [blame] | 120 | if (irqst_spcr1 & RSYNC_ERR) { |
| 121 | dev_err(mcbsp_rx->dev, "RX Frame Sync Error! : 0x%x\n", |
| 122 | irqst_spcr1); |
| 123 | /* Writing zero to RSYNC_ERR clears the IRQ */ |
| 124 | OMAP_MCBSP_WRITE(mcbsp_rx->io_base, SPCR1, |
| 125 | irqst_spcr1 & ~(RSYNC_ERR)); |
| 126 | } else { |
| 127 | complete(&mcbsp_rx->tx_irq_completion); |
| 128 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 129 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 130 | return IRQ_HANDLED; |
| 131 | } |
| 132 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 133 | static void omap_mcbsp_tx_dma_callback(int lch, u16 ch_status, void *data) |
| 134 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 135 | struct omap_mcbsp *mcbsp_dma_tx = data; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 136 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 137 | dev_dbg(mcbsp_dma_tx->dev, "TX DMA callback : 0x%x\n", |
| 138 | OMAP_MCBSP_READ(mcbsp_dma_tx->io_base, SPCR2)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 139 | |
| 140 | /* We can free the channels */ |
| 141 | omap_free_dma(mcbsp_dma_tx->dma_tx_lch); |
| 142 | mcbsp_dma_tx->dma_tx_lch = -1; |
| 143 | |
| 144 | complete(&mcbsp_dma_tx->tx_dma_completion); |
| 145 | } |
| 146 | |
| 147 | static void omap_mcbsp_rx_dma_callback(int lch, u16 ch_status, void *data) |
| 148 | { |
Jeff Garzik | e8f2af1 | 2007-10-26 05:40:25 -0400 | [diff] [blame] | 149 | struct omap_mcbsp *mcbsp_dma_rx = data; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 150 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 151 | dev_dbg(mcbsp_dma_rx->dev, "RX DMA callback : 0x%x\n", |
| 152 | OMAP_MCBSP_READ(mcbsp_dma_rx->io_base, SPCR2)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 153 | |
| 154 | /* We can free the channels */ |
| 155 | omap_free_dma(mcbsp_dma_rx->dma_rx_lch); |
| 156 | mcbsp_dma_rx->dma_rx_lch = -1; |
| 157 | |
| 158 | complete(&mcbsp_dma_rx->rx_dma_completion); |
| 159 | } |
| 160 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 161 | /* |
| 162 | * omap_mcbsp_config simply write a config to the |
| 163 | * appropriate McBSP. |
| 164 | * You either call this function or set the McBSP registers |
| 165 | * by yourself before calling omap_mcbsp_start(). |
| 166 | */ |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 167 | void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 168 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 169 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 170 | void __iomem *io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 171 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 172 | if (!omap_mcbsp_check_valid_id(id)) { |
| 173 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 174 | return; |
| 175 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 176 | mcbsp = id_to_mcbsp_ptr(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 177 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 178 | io_base = mcbsp->io_base; |
| 179 | dev_dbg(mcbsp->dev, "Configuring McBSP%d phys_base: 0x%08lx\n", |
| 180 | mcbsp->id, mcbsp->phys_base); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 181 | |
| 182 | /* We write the given config */ |
| 183 | OMAP_MCBSP_WRITE(io_base, SPCR2, config->spcr2); |
| 184 | OMAP_MCBSP_WRITE(io_base, SPCR1, config->spcr1); |
| 185 | OMAP_MCBSP_WRITE(io_base, RCR2, config->rcr2); |
| 186 | OMAP_MCBSP_WRITE(io_base, RCR1, config->rcr1); |
| 187 | OMAP_MCBSP_WRITE(io_base, XCR2, config->xcr2); |
| 188 | OMAP_MCBSP_WRITE(io_base, XCR1, config->xcr1); |
| 189 | OMAP_MCBSP_WRITE(io_base, SRGR2, config->srgr2); |
| 190 | OMAP_MCBSP_WRITE(io_base, SRGR1, config->srgr1); |
| 191 | OMAP_MCBSP_WRITE(io_base, MCR2, config->mcr2); |
| 192 | OMAP_MCBSP_WRITE(io_base, MCR1, config->mcr1); |
| 193 | OMAP_MCBSP_WRITE(io_base, PCR0, config->pcr0); |
Tony Lindgren | 3127f8f | 2009-01-15 13:09:54 +0200 | [diff] [blame] | 194 | if (cpu_is_omap2430() || cpu_is_omap34xx()) { |
| 195 | OMAP_MCBSP_WRITE(io_base, XCCR, config->xccr); |
| 196 | OMAP_MCBSP_WRITE(io_base, RCCR, config->rccr); |
| 197 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 198 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 199 | EXPORT_SYMBOL(omap_mcbsp_config); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 200 | |
Eduardo Valentin | 7aa9ff5 | 2009-08-20 16:18:10 +0300 | [diff] [blame^] | 201 | #ifdef CONFIG_ARCH_OMAP34XX |
| 202 | /* |
| 203 | * omap_mcbsp_set_tx_threshold configures how to deal |
| 204 | * with transmit threshold. the threshold value and handler can be |
| 205 | * configure in here. |
| 206 | */ |
| 207 | void omap_mcbsp_set_tx_threshold(unsigned int id, u16 threshold) |
| 208 | { |
| 209 | struct omap_mcbsp *mcbsp; |
| 210 | void __iomem *io_base; |
| 211 | |
| 212 | if (!cpu_is_omap34xx()) |
| 213 | return; |
| 214 | |
| 215 | if (!omap_mcbsp_check_valid_id(id)) { |
| 216 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 217 | return; |
| 218 | } |
| 219 | mcbsp = id_to_mcbsp_ptr(id); |
| 220 | io_base = mcbsp->io_base; |
| 221 | |
| 222 | OMAP_MCBSP_WRITE(io_base, THRSH2, threshold); |
| 223 | } |
| 224 | EXPORT_SYMBOL(omap_mcbsp_set_tx_threshold); |
| 225 | |
| 226 | /* |
| 227 | * omap_mcbsp_set_rx_threshold configures how to deal |
| 228 | * with receive threshold. the threshold value and handler can be |
| 229 | * configure in here. |
| 230 | */ |
| 231 | void omap_mcbsp_set_rx_threshold(unsigned int id, u16 threshold) |
| 232 | { |
| 233 | struct omap_mcbsp *mcbsp; |
| 234 | void __iomem *io_base; |
| 235 | |
| 236 | if (!cpu_is_omap34xx()) |
| 237 | return; |
| 238 | |
| 239 | if (!omap_mcbsp_check_valid_id(id)) { |
| 240 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 241 | return; |
| 242 | } |
| 243 | mcbsp = id_to_mcbsp_ptr(id); |
| 244 | io_base = mcbsp->io_base; |
| 245 | |
| 246 | OMAP_MCBSP_WRITE(io_base, THRSH1, threshold); |
| 247 | } |
| 248 | EXPORT_SYMBOL(omap_mcbsp_set_rx_threshold); |
| 249 | #endif |
| 250 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 251 | /* |
| 252 | * We can choose between IRQ based or polled IO. |
| 253 | * This needs to be called before omap_mcbsp_request(). |
| 254 | */ |
| 255 | int omap_mcbsp_set_io_type(unsigned int id, omap_mcbsp_io_type_t io_type) |
| 256 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 257 | struct omap_mcbsp *mcbsp; |
| 258 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 259 | if (!omap_mcbsp_check_valid_id(id)) { |
| 260 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 261 | return -ENODEV; |
| 262 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 263 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 264 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 265 | spin_lock(&mcbsp->lock); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 266 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 267 | if (!mcbsp->free) { |
| 268 | dev_err(mcbsp->dev, "McBSP%d is currently in use\n", |
| 269 | mcbsp->id); |
| 270 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 271 | return -EINVAL; |
| 272 | } |
| 273 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 274 | mcbsp->io_type = io_type; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 275 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 276 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 277 | |
| 278 | return 0; |
| 279 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 280 | EXPORT_SYMBOL(omap_mcbsp_set_io_type); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 281 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 282 | int omap_mcbsp_request(unsigned int id) |
| 283 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 284 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 285 | int err; |
| 286 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 287 | if (!omap_mcbsp_check_valid_id(id)) { |
| 288 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 289 | return -ENODEV; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 290 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 291 | mcbsp = id_to_mcbsp_ptr(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 292 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 293 | spin_lock(&mcbsp->lock); |
| 294 | if (!mcbsp->free) { |
| 295 | dev_err(mcbsp->dev, "McBSP%d is currently in use\n", |
| 296 | mcbsp->id); |
| 297 | spin_unlock(&mcbsp->lock); |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 298 | return -EBUSY; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 299 | } |
| 300 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 301 | mcbsp->free = 0; |
| 302 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 303 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 304 | if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->request) |
| 305 | mcbsp->pdata->ops->request(id); |
| 306 | |
| 307 | clk_enable(mcbsp->iclk); |
| 308 | clk_enable(mcbsp->fclk); |
| 309 | |
Jarkko Nikula | 5a07055 | 2008-10-08 10:01:41 +0300 | [diff] [blame] | 310 | /* |
| 311 | * Make sure that transmitter, receiver and sample-rate generator are |
| 312 | * not running before activating IRQs. |
| 313 | */ |
| 314 | OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR1, 0); |
| 315 | OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR2, 0); |
| 316 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 317 | if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 318 | /* We need to get IRQs here */ |
Jarkko Nikula | 5a07055 | 2008-10-08 10:01:41 +0300 | [diff] [blame] | 319 | init_completion(&mcbsp->tx_irq_completion); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 320 | err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler, |
| 321 | 0, "McBSP", (void *)mcbsp); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 322 | if (err != 0) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 323 | dev_err(mcbsp->dev, "Unable to request TX IRQ %d " |
| 324 | "for McBSP%d\n", mcbsp->tx_irq, |
| 325 | mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 326 | return err; |
| 327 | } |
| 328 | |
Jarkko Nikula | 5a07055 | 2008-10-08 10:01:41 +0300 | [diff] [blame] | 329 | init_completion(&mcbsp->rx_irq_completion); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 330 | err = request_irq(mcbsp->rx_irq, omap_mcbsp_rx_irq_handler, |
| 331 | 0, "McBSP", (void *)mcbsp); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 332 | if (err != 0) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 333 | dev_err(mcbsp->dev, "Unable to request RX IRQ %d " |
| 334 | "for McBSP%d\n", mcbsp->rx_irq, |
| 335 | mcbsp->id); |
| 336 | free_irq(mcbsp->tx_irq, (void *)mcbsp); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 337 | return err; |
| 338 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 339 | } |
| 340 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 341 | return 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 342 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 343 | EXPORT_SYMBOL(omap_mcbsp_request); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 344 | |
| 345 | void omap_mcbsp_free(unsigned int id) |
| 346 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 347 | struct omap_mcbsp *mcbsp; |
| 348 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 349 | if (!omap_mcbsp_check_valid_id(id)) { |
| 350 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 351 | return; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 352 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 353 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 354 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 355 | if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free) |
| 356 | mcbsp->pdata->ops->free(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 357 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 358 | clk_disable(mcbsp->fclk); |
| 359 | clk_disable(mcbsp->iclk); |
| 360 | |
| 361 | if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { |
| 362 | /* Free IRQs */ |
| 363 | free_irq(mcbsp->rx_irq, (void *)mcbsp); |
| 364 | free_irq(mcbsp->tx_irq, (void *)mcbsp); |
| 365 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 366 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 367 | spin_lock(&mcbsp->lock); |
| 368 | if (mcbsp->free) { |
| 369 | dev_err(mcbsp->dev, "McBSP%d was not reserved\n", |
| 370 | mcbsp->id); |
| 371 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 372 | return; |
| 373 | } |
| 374 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 375 | mcbsp->free = 1; |
| 376 | spin_unlock(&mcbsp->lock); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 377 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 378 | EXPORT_SYMBOL(omap_mcbsp_free); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 379 | |
| 380 | /* |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 381 | * Here we start the McBSP, by enabling transmitter, receiver or both. |
| 382 | * If no transmitter or receiver is active prior calling, then sample-rate |
| 383 | * generator and frame sync are started. |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 384 | */ |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 385 | void omap_mcbsp_start(unsigned int id, int tx, int rx) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 386 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 387 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 388 | void __iomem *io_base; |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 389 | int idle; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 390 | u16 w; |
| 391 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 392 | if (!omap_mcbsp_check_valid_id(id)) { |
| 393 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 394 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 395 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 396 | mcbsp = id_to_mcbsp_ptr(id); |
| 397 | io_base = mcbsp->io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 398 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 399 | mcbsp->rx_word_length = (OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7; |
| 400 | mcbsp->tx_word_length = (OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 401 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 402 | idle = !((OMAP_MCBSP_READ(io_base, SPCR2) | |
| 403 | OMAP_MCBSP_READ(io_base, SPCR1)) & 1); |
| 404 | |
| 405 | if (idle) { |
| 406 | /* Start the sample generator */ |
| 407 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
| 408 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 6)); |
| 409 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 410 | |
| 411 | /* Enable transmitter and receiver */ |
| 412 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 413 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | (tx & 1)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 414 | |
| 415 | w = OMAP_MCBSP_READ(io_base, SPCR1); |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 416 | OMAP_MCBSP_WRITE(io_base, SPCR1, w | (rx & 1)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 417 | |
Eduardo Valentin | 44a6311 | 2009-08-20 16:18:09 +0300 | [diff] [blame] | 418 | /* |
| 419 | * Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec |
| 420 | * REVISIT: 100us may give enough time for two CLKSRG, however |
| 421 | * due to some unknown PM related, clock gating etc. reason it |
| 422 | * is now at 500us. |
| 423 | */ |
| 424 | udelay(500); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 425 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 426 | if (idle) { |
| 427 | /* Start frame sync */ |
| 428 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
| 429 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7)); |
| 430 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 431 | |
| 432 | /* Dump McBSP Regs */ |
| 433 | omap_mcbsp_dump_reg(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 434 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 435 | EXPORT_SYMBOL(omap_mcbsp_start); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 436 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 437 | void omap_mcbsp_stop(unsigned int id, int tx, int rx) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 438 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 439 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 440 | void __iomem *io_base; |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 441 | int idle; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 442 | u16 w; |
| 443 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 444 | if (!omap_mcbsp_check_valid_id(id)) { |
| 445 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 446 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 447 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 448 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 449 | mcbsp = id_to_mcbsp_ptr(id); |
| 450 | io_base = mcbsp->io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 451 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 452 | /* Reset transmitter */ |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 453 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 454 | OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(tx & 1)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 455 | |
| 456 | /* Reset receiver */ |
| 457 | w = OMAP_MCBSP_READ(io_base, SPCR1); |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 458 | OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~(rx & 1)); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 459 | |
Jarkko Nikula | c12abc0 | 2009-08-07 09:59:47 +0300 | [diff] [blame] | 460 | idle = !((OMAP_MCBSP_READ(io_base, SPCR2) | |
| 461 | OMAP_MCBSP_READ(io_base, SPCR1)) & 1); |
| 462 | |
| 463 | if (idle) { |
| 464 | /* Reset the sample rate generator */ |
| 465 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
| 466 | OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6)); |
| 467 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 468 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 469 | EXPORT_SYMBOL(omap_mcbsp_stop); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 470 | |
Eero Nurkkala | 9abea08 | 2009-08-20 16:18:07 +0300 | [diff] [blame] | 471 | void omap_mcbsp_xmit_enable(unsigned int id, u8 enable) |
| 472 | { |
| 473 | struct omap_mcbsp *mcbsp; |
| 474 | void __iomem *io_base; |
| 475 | u16 w; |
| 476 | |
| 477 | if (!(cpu_is_omap2430() || cpu_is_omap34xx())) |
| 478 | return; |
| 479 | |
| 480 | if (!omap_mcbsp_check_valid_id(id)) { |
| 481 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 482 | return; |
| 483 | } |
| 484 | |
| 485 | mcbsp = id_to_mcbsp_ptr(id); |
| 486 | io_base = mcbsp->io_base; |
| 487 | |
| 488 | w = OMAP_MCBSP_READ(io_base, XCCR); |
| 489 | |
| 490 | if (enable) |
| 491 | OMAP_MCBSP_WRITE(io_base, XCCR, w & ~(XDISABLE)); |
| 492 | else |
| 493 | OMAP_MCBSP_WRITE(io_base, XCCR, w | XDISABLE); |
| 494 | } |
| 495 | EXPORT_SYMBOL(omap_mcbsp_xmit_enable); |
| 496 | |
| 497 | void omap_mcbsp_recv_enable(unsigned int id, u8 enable) |
| 498 | { |
| 499 | struct omap_mcbsp *mcbsp; |
| 500 | void __iomem *io_base; |
| 501 | u16 w; |
| 502 | |
| 503 | if (!(cpu_is_omap2430() || cpu_is_omap34xx())) |
| 504 | return; |
| 505 | |
| 506 | if (!omap_mcbsp_check_valid_id(id)) { |
| 507 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 508 | return; |
| 509 | } |
| 510 | |
| 511 | mcbsp = id_to_mcbsp_ptr(id); |
| 512 | io_base = mcbsp->io_base; |
| 513 | |
| 514 | w = OMAP_MCBSP_READ(io_base, RCCR); |
| 515 | |
| 516 | if (enable) |
| 517 | OMAP_MCBSP_WRITE(io_base, RCCR, w & ~(RDISABLE)); |
| 518 | else |
| 519 | OMAP_MCBSP_WRITE(io_base, RCCR, w | RDISABLE); |
| 520 | } |
| 521 | EXPORT_SYMBOL(omap_mcbsp_recv_enable); |
| 522 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 523 | /* polled mcbsp i/o operations */ |
| 524 | int omap_mcbsp_pollwrite(unsigned int id, u16 buf) |
| 525 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 526 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 527 | void __iomem *base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 528 | |
| 529 | if (!omap_mcbsp_check_valid_id(id)) { |
| 530 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 531 | return -ENODEV; |
| 532 | } |
| 533 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 534 | mcbsp = id_to_mcbsp_ptr(id); |
| 535 | base = mcbsp->io_base; |
| 536 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 537 | writew(buf, base + OMAP_MCBSP_REG_DXR1); |
| 538 | /* if frame sync error - clear the error */ |
| 539 | if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) { |
| 540 | /* clear error */ |
| 541 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) & (~XSYNC_ERR), |
| 542 | base + OMAP_MCBSP_REG_SPCR2); |
| 543 | /* resend */ |
| 544 | return -1; |
| 545 | } else { |
| 546 | /* wait for transmit confirmation */ |
| 547 | int attemps = 0; |
| 548 | while (!(readw(base + OMAP_MCBSP_REG_SPCR2) & XRDY)) { |
| 549 | if (attemps++ > 1000) { |
| 550 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) & |
| 551 | (~XRST), |
| 552 | base + OMAP_MCBSP_REG_SPCR2); |
| 553 | udelay(10); |
| 554 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) | |
| 555 | (XRST), |
| 556 | base + OMAP_MCBSP_REG_SPCR2); |
| 557 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 558 | dev_err(mcbsp->dev, "Could not write to" |
| 559 | " McBSP%d Register\n", mcbsp->id); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 560 | return -2; |
| 561 | } |
| 562 | } |
| 563 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 564 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 565 | return 0; |
| 566 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 567 | EXPORT_SYMBOL(omap_mcbsp_pollwrite); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 568 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 569 | int omap_mcbsp_pollread(unsigned int id, u16 *buf) |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 570 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 571 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 572 | void __iomem *base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 573 | |
| 574 | if (!omap_mcbsp_check_valid_id(id)) { |
| 575 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 576 | return -ENODEV; |
| 577 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 578 | mcbsp = id_to_mcbsp_ptr(id); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 579 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 580 | base = mcbsp->io_base; |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 581 | /* if frame sync error - clear the error */ |
| 582 | if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) { |
| 583 | /* clear error */ |
| 584 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) & (~RSYNC_ERR), |
| 585 | base + OMAP_MCBSP_REG_SPCR1); |
| 586 | /* resend */ |
| 587 | return -1; |
| 588 | } else { |
| 589 | /* wait for recieve confirmation */ |
| 590 | int attemps = 0; |
| 591 | while (!(readw(base + OMAP_MCBSP_REG_SPCR1) & RRDY)) { |
| 592 | if (attemps++ > 1000) { |
| 593 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) & |
| 594 | (~RRST), |
| 595 | base + OMAP_MCBSP_REG_SPCR1); |
| 596 | udelay(10); |
| 597 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) | |
| 598 | (RRST), |
| 599 | base + OMAP_MCBSP_REG_SPCR1); |
| 600 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 601 | dev_err(mcbsp->dev, "Could not read from" |
| 602 | " McBSP%d Register\n", mcbsp->id); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 603 | return -2; |
| 604 | } |
| 605 | } |
| 606 | } |
| 607 | *buf = readw(base + OMAP_MCBSP_REG_DRR1); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 608 | |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 609 | return 0; |
| 610 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 611 | EXPORT_SYMBOL(omap_mcbsp_pollread); |
Tony Lindgren | bb13b5f | 2005-07-10 19:58:18 +0100 | [diff] [blame] | 612 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 613 | /* |
| 614 | * IRQ based word transmission. |
| 615 | */ |
| 616 | void omap_mcbsp_xmit_word(unsigned int id, u32 word) |
| 617 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 618 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 619 | void __iomem *io_base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 620 | omap_mcbsp_word_length word_length; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 621 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 622 | if (!omap_mcbsp_check_valid_id(id)) { |
| 623 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 624 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 625 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 626 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 627 | mcbsp = id_to_mcbsp_ptr(id); |
| 628 | io_base = mcbsp->io_base; |
| 629 | word_length = mcbsp->tx_word_length; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 630 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 631 | wait_for_completion(&mcbsp->tx_irq_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 632 | |
| 633 | if (word_length > OMAP_MCBSP_WORD_16) |
| 634 | OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16); |
| 635 | OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff); |
| 636 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 637 | EXPORT_SYMBOL(omap_mcbsp_xmit_word); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 638 | |
| 639 | u32 omap_mcbsp_recv_word(unsigned int id) |
| 640 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 641 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 642 | void __iomem *io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 643 | u16 word_lsb, word_msb = 0; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 644 | omap_mcbsp_word_length word_length; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 645 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 646 | if (!omap_mcbsp_check_valid_id(id)) { |
| 647 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 648 | return -ENODEV; |
| 649 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 650 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 651 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 652 | word_length = mcbsp->rx_word_length; |
| 653 | io_base = mcbsp->io_base; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 654 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 655 | wait_for_completion(&mcbsp->rx_irq_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 656 | |
| 657 | if (word_length > OMAP_MCBSP_WORD_16) |
| 658 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); |
| 659 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); |
| 660 | |
| 661 | return (word_lsb | (word_msb << 16)); |
| 662 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 663 | EXPORT_SYMBOL(omap_mcbsp_recv_word); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 664 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 665 | int omap_mcbsp_spi_master_xmit_word_poll(unsigned int id, u32 word) |
| 666 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 667 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 668 | void __iomem *io_base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 669 | omap_mcbsp_word_length tx_word_length; |
| 670 | omap_mcbsp_word_length rx_word_length; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 671 | u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0; |
| 672 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 673 | if (!omap_mcbsp_check_valid_id(id)) { |
| 674 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 675 | return -ENODEV; |
| 676 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 677 | mcbsp = id_to_mcbsp_ptr(id); |
| 678 | io_base = mcbsp->io_base; |
| 679 | tx_word_length = mcbsp->tx_word_length; |
| 680 | rx_word_length = mcbsp->rx_word_length; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 681 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 682 | if (tx_word_length != rx_word_length) |
| 683 | return -EINVAL; |
| 684 | |
| 685 | /* First we wait for the transmitter to be ready */ |
| 686 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 687 | while (!(spcr2 & XRDY)) { |
| 688 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 689 | if (attempts++ > 1000) { |
| 690 | /* We must reset the transmitter */ |
| 691 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 & (~XRST)); |
| 692 | udelay(10); |
| 693 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST); |
| 694 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 695 | dev_err(mcbsp->dev, "McBSP%d transmitter not " |
| 696 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 697 | return -EAGAIN; |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | /* Now we can push the data */ |
| 702 | if (tx_word_length > OMAP_MCBSP_WORD_16) |
| 703 | OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16); |
| 704 | OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff); |
| 705 | |
| 706 | /* We wait for the receiver to be ready */ |
| 707 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 708 | while (!(spcr1 & RRDY)) { |
| 709 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 710 | if (attempts++ > 1000) { |
| 711 | /* We must reset the receiver */ |
| 712 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 & (~RRST)); |
| 713 | udelay(10); |
| 714 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST); |
| 715 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 716 | dev_err(mcbsp->dev, "McBSP%d receiver not " |
| 717 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 718 | return -EAGAIN; |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | /* Receiver is ready, let's read the dummy data */ |
| 723 | if (rx_word_length > OMAP_MCBSP_WORD_16) |
| 724 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); |
| 725 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); |
| 726 | |
| 727 | return 0; |
| 728 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 729 | EXPORT_SYMBOL(omap_mcbsp_spi_master_xmit_word_poll); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 730 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 731 | int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 *word) |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 732 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 733 | struct omap_mcbsp *mcbsp; |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 734 | u32 clock_word = 0; |
| 735 | void __iomem *io_base; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 736 | omap_mcbsp_word_length tx_word_length; |
| 737 | omap_mcbsp_word_length rx_word_length; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 738 | u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0; |
| 739 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 740 | if (!omap_mcbsp_check_valid_id(id)) { |
| 741 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 742 | return -ENODEV; |
| 743 | } |
| 744 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 745 | mcbsp = id_to_mcbsp_ptr(id); |
| 746 | io_base = mcbsp->io_base; |
| 747 | |
| 748 | tx_word_length = mcbsp->tx_word_length; |
| 749 | rx_word_length = mcbsp->rx_word_length; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 750 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 751 | if (tx_word_length != rx_word_length) |
| 752 | return -EINVAL; |
| 753 | |
| 754 | /* First we wait for the transmitter to be ready */ |
| 755 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 756 | while (!(spcr2 & XRDY)) { |
| 757 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); |
| 758 | if (attempts++ > 1000) { |
| 759 | /* We must reset the transmitter */ |
| 760 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 & (~XRST)); |
| 761 | udelay(10); |
| 762 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST); |
| 763 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 764 | dev_err(mcbsp->dev, "McBSP%d transmitter not " |
| 765 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 766 | return -EAGAIN; |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | /* We first need to enable the bus clock */ |
| 771 | if (tx_word_length > OMAP_MCBSP_WORD_16) |
| 772 | OMAP_MCBSP_WRITE(io_base, DXR2, clock_word >> 16); |
| 773 | OMAP_MCBSP_WRITE(io_base, DXR1, clock_word & 0xffff); |
| 774 | |
| 775 | /* We wait for the receiver to be ready */ |
| 776 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 777 | while (!(spcr1 & RRDY)) { |
| 778 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); |
| 779 | if (attempts++ > 1000) { |
| 780 | /* We must reset the receiver */ |
| 781 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 & (~RRST)); |
| 782 | udelay(10); |
| 783 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST); |
| 784 | udelay(10); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 785 | dev_err(mcbsp->dev, "McBSP%d receiver not " |
| 786 | "ready\n", mcbsp->id); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 787 | return -EAGAIN; |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | /* Receiver is ready, there is something for us */ |
| 792 | if (rx_word_length > OMAP_MCBSP_WORD_16) |
| 793 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); |
| 794 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); |
| 795 | |
| 796 | word[0] = (word_lsb | (word_msb << 16)); |
| 797 | |
| 798 | return 0; |
| 799 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 800 | EXPORT_SYMBOL(omap_mcbsp_spi_master_recv_word_poll); |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 801 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 802 | /* |
| 803 | * Simple DMA based buffer rx/tx routines. |
| 804 | * Nothing fancy, just a single buffer tx/rx through DMA. |
| 805 | * The DMA resources are released once the transfer is done. |
| 806 | * For anything fancier, you should use your own customized DMA |
| 807 | * routines and callbacks. |
| 808 | */ |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 809 | int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer, |
| 810 | unsigned int length) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 811 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 812 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 813 | int dma_tx_ch; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 814 | int src_port = 0; |
| 815 | int dest_port = 0; |
| 816 | int sync_dev = 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 817 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 818 | if (!omap_mcbsp_check_valid_id(id)) { |
| 819 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 820 | return -ENODEV; |
| 821 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 822 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 823 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 824 | if (omap_request_dma(mcbsp->dma_tx_sync, "McBSP TX", |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 825 | omap_mcbsp_tx_dma_callback, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 826 | mcbsp, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 827 | &dma_tx_ch)) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 828 | dev_err(mcbsp->dev, " Unable to request DMA channel for " |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 829 | "McBSP%d TX. Trying IRQ based TX\n", |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 830 | mcbsp->id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 831 | return -EAGAIN; |
| 832 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 833 | mcbsp->dma_tx_lch = dma_tx_ch; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 834 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 835 | dev_err(mcbsp->dev, "McBSP%d TX DMA on channel %d\n", mcbsp->id, |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 836 | dma_tx_ch); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 837 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 838 | init_completion(&mcbsp->tx_dma_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 839 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 840 | if (cpu_class_is_omap1()) { |
| 841 | src_port = OMAP_DMA_PORT_TIPB; |
| 842 | dest_port = OMAP_DMA_PORT_EMIFF; |
| 843 | } |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 844 | if (cpu_class_is_omap2()) |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 845 | sync_dev = mcbsp->dma_tx_sync; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 846 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 847 | omap_set_dma_transfer_params(mcbsp->dma_tx_lch, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 848 | OMAP_DMA_DATA_TYPE_S16, |
| 849 | length >> 1, 1, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 850 | OMAP_DMA_SYNC_ELEMENT, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 851 | sync_dev, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 852 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 853 | omap_set_dma_dest_params(mcbsp->dma_tx_lch, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 854 | src_port, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 855 | OMAP_DMA_AMODE_CONSTANT, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 856 | mcbsp->phys_base + OMAP_MCBSP_REG_DXR1, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 857 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 858 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 859 | omap_set_dma_src_params(mcbsp->dma_tx_lch, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 860 | dest_port, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 861 | OMAP_DMA_AMODE_POST_INC, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 862 | buffer, |
| 863 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 864 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 865 | omap_start_dma(mcbsp->dma_tx_lch); |
| 866 | wait_for_completion(&mcbsp->tx_dma_completion); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 867 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 868 | return 0; |
| 869 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 870 | EXPORT_SYMBOL(omap_mcbsp_xmit_buffer); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 871 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 872 | int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer, |
| 873 | unsigned int length) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 874 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 875 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 876 | int dma_rx_ch; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 877 | int src_port = 0; |
| 878 | int dest_port = 0; |
| 879 | int sync_dev = 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 880 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 881 | if (!omap_mcbsp_check_valid_id(id)) { |
| 882 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
| 883 | return -ENODEV; |
| 884 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 885 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 886 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 887 | if (omap_request_dma(mcbsp->dma_rx_sync, "McBSP RX", |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 888 | omap_mcbsp_rx_dma_callback, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 889 | mcbsp, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 890 | &dma_rx_ch)) { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 891 | dev_err(mcbsp->dev, "Unable to request DMA channel for " |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 892 | "McBSP%d RX. Trying IRQ based RX\n", |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 893 | mcbsp->id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 894 | return -EAGAIN; |
| 895 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 896 | mcbsp->dma_rx_lch = dma_rx_ch; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 897 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 898 | dev_err(mcbsp->dev, "McBSP%d RX DMA on channel %d\n", mcbsp->id, |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 899 | dma_rx_ch); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 900 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 901 | init_completion(&mcbsp->rx_dma_completion); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 902 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 903 | if (cpu_class_is_omap1()) { |
| 904 | src_port = OMAP_DMA_PORT_TIPB; |
| 905 | dest_port = OMAP_DMA_PORT_EMIFF; |
| 906 | } |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 907 | if (cpu_class_is_omap2()) |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 908 | sync_dev = mcbsp->dma_rx_sync; |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 909 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 910 | omap_set_dma_transfer_params(mcbsp->dma_rx_lch, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 911 | OMAP_DMA_DATA_TYPE_S16, |
| 912 | length >> 1, 1, |
| 913 | OMAP_DMA_SYNC_ELEMENT, |
| 914 | sync_dev, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 915 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 916 | omap_set_dma_src_params(mcbsp->dma_rx_lch, |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 917 | src_port, |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 918 | OMAP_DMA_AMODE_CONSTANT, |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 919 | mcbsp->phys_base + OMAP_MCBSP_REG_DRR1, |
Tony Lindgren | 1a8bfa1 | 2005-11-10 14:26:50 +0000 | [diff] [blame] | 920 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 921 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 922 | omap_set_dma_dest_params(mcbsp->dma_rx_lch, |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 923 | dest_port, |
| 924 | OMAP_DMA_AMODE_POST_INC, |
| 925 | buffer, |
| 926 | 0, 0); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 927 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 928 | omap_start_dma(mcbsp->dma_rx_lch); |
| 929 | wait_for_completion(&mcbsp->rx_dma_completion); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 930 | |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 931 | return 0; |
| 932 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 933 | EXPORT_SYMBOL(omap_mcbsp_recv_buffer); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 934 | |
| 935 | /* |
| 936 | * SPI wrapper. |
| 937 | * Since SPI setup is much simpler than the generic McBSP one, |
| 938 | * this wrapper just need an omap_mcbsp_spi_cfg structure as an input. |
| 939 | * Once this is done, you can call omap_mcbsp_start(). |
| 940 | */ |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 941 | void omap_mcbsp_set_spi_mode(unsigned int id, |
| 942 | const struct omap_mcbsp_spi_cfg *spi_cfg) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 943 | { |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 944 | struct omap_mcbsp *mcbsp; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 945 | struct omap_mcbsp_reg_cfg mcbsp_cfg; |
| 946 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 947 | if (!omap_mcbsp_check_valid_id(id)) { |
| 948 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 949 | return; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 950 | } |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 951 | mcbsp = id_to_mcbsp_ptr(id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 952 | |
| 953 | memset(&mcbsp_cfg, 0, sizeof(struct omap_mcbsp_reg_cfg)); |
| 954 | |
| 955 | /* SPI has only one frame */ |
| 956 | mcbsp_cfg.rcr1 |= (RWDLEN1(spi_cfg->word_length) | RFRLEN1(0)); |
| 957 | mcbsp_cfg.xcr1 |= (XWDLEN1(spi_cfg->word_length) | XFRLEN1(0)); |
| 958 | |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 959 | /* Clock stop mode */ |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 960 | if (spi_cfg->clk_stp_mode == OMAP_MCBSP_CLK_STP_MODE_NO_DELAY) |
| 961 | mcbsp_cfg.spcr1 |= (1 << 12); |
| 962 | else |
| 963 | mcbsp_cfg.spcr1 |= (3 << 11); |
| 964 | |
| 965 | /* Set clock parities */ |
| 966 | if (spi_cfg->rx_clock_polarity == OMAP_MCBSP_CLK_RISING) |
| 967 | mcbsp_cfg.pcr0 |= CLKRP; |
| 968 | else |
| 969 | mcbsp_cfg.pcr0 &= ~CLKRP; |
| 970 | |
| 971 | if (spi_cfg->tx_clock_polarity == OMAP_MCBSP_CLK_RISING) |
| 972 | mcbsp_cfg.pcr0 &= ~CLKXP; |
| 973 | else |
| 974 | mcbsp_cfg.pcr0 |= CLKXP; |
| 975 | |
| 976 | /* Set SCLKME to 0 and CLKSM to 1 */ |
| 977 | mcbsp_cfg.pcr0 &= ~SCLKME; |
| 978 | mcbsp_cfg.srgr2 |= CLKSM; |
| 979 | |
| 980 | /* Set FSXP */ |
| 981 | if (spi_cfg->fsx_polarity == OMAP_MCBSP_FS_ACTIVE_HIGH) |
| 982 | mcbsp_cfg.pcr0 &= ~FSXP; |
| 983 | else |
| 984 | mcbsp_cfg.pcr0 |= FSXP; |
| 985 | |
| 986 | if (spi_cfg->spi_mode == OMAP_MCBSP_SPI_MASTER) { |
| 987 | mcbsp_cfg.pcr0 |= CLKXM; |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 988 | mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div - 1); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 989 | mcbsp_cfg.pcr0 |= FSXM; |
| 990 | mcbsp_cfg.srgr2 &= ~FSGM; |
| 991 | mcbsp_cfg.xcr2 |= XDATDLY(1); |
| 992 | mcbsp_cfg.rcr2 |= RDATDLY(1); |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 993 | } else { |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 994 | mcbsp_cfg.pcr0 &= ~CLKXM; |
| 995 | mcbsp_cfg.srgr1 |= CLKGDV(1); |
| 996 | mcbsp_cfg.pcr0 &= ~FSXM; |
| 997 | mcbsp_cfg.xcr2 &= ~XDATDLY(3); |
| 998 | mcbsp_cfg.rcr2 &= ~RDATDLY(3); |
| 999 | } |
| 1000 | |
| 1001 | mcbsp_cfg.xcr2 &= ~XPHASE; |
| 1002 | mcbsp_cfg.rcr2 &= ~RPHASE; |
| 1003 | |
| 1004 | omap_mcbsp_config(id, &mcbsp_cfg); |
| 1005 | } |
Eduardo Valentin | fb78d80 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1006 | EXPORT_SYMBOL(omap_mcbsp_set_spi_mode); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1007 | |
| 1008 | /* |
| 1009 | * McBSP1 and McBSP3 are directly mapped on 1610 and 1510. |
| 1010 | * 730 has only 2 McBSP, and both of them are MPU peripherals. |
| 1011 | */ |
Uwe Kleine-König | 25cef22 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1012 | static int __devinit omap_mcbsp_probe(struct platform_device *pdev) |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1013 | { |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1014 | struct omap_mcbsp_platform_data *pdata = pdev->dev.platform_data; |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1015 | struct omap_mcbsp *mcbsp; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1016 | int id = pdev->id - 1; |
| 1017 | int ret = 0; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1018 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1019 | if (!pdata) { |
| 1020 | dev_err(&pdev->dev, "McBSP device initialized without" |
| 1021 | "platform data\n"); |
| 1022 | ret = -EINVAL; |
| 1023 | goto exit; |
| 1024 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1025 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1026 | dev_dbg(&pdev->dev, "Initializing OMAP McBSP (%d).\n", pdev->id); |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1027 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1028 | if (id >= omap_mcbsp_count) { |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1029 | dev_err(&pdev->dev, "Invalid McBSP device id (%d)\n", id); |
| 1030 | ret = -EINVAL; |
| 1031 | goto exit; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1032 | } |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1033 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1034 | mcbsp = kzalloc(sizeof(struct omap_mcbsp), GFP_KERNEL); |
| 1035 | if (!mcbsp) { |
| 1036 | ret = -ENOMEM; |
| 1037 | goto exit; |
| 1038 | } |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1039 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1040 | spin_lock_init(&mcbsp->lock); |
| 1041 | mcbsp->id = id + 1; |
| 1042 | mcbsp->free = 1; |
| 1043 | mcbsp->dma_tx_lch = -1; |
| 1044 | mcbsp->dma_rx_lch = -1; |
| 1045 | |
| 1046 | mcbsp->phys_base = pdata->phys_base; |
| 1047 | mcbsp->io_base = ioremap(pdata->phys_base, SZ_4K); |
| 1048 | if (!mcbsp->io_base) { |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1049 | ret = -ENOMEM; |
| 1050 | goto err_ioremap; |
| 1051 | } |
| 1052 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1053 | /* Default I/O is IRQ based */ |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1054 | mcbsp->io_type = OMAP_MCBSP_IRQ_IO; |
| 1055 | mcbsp->tx_irq = pdata->tx_irq; |
| 1056 | mcbsp->rx_irq = pdata->rx_irq; |
| 1057 | mcbsp->dma_rx_sync = pdata->dma_rx_sync; |
| 1058 | mcbsp->dma_tx_sync = pdata->dma_tx_sync; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1059 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1060 | mcbsp->iclk = clk_get(&pdev->dev, "ick"); |
| 1061 | if (IS_ERR(mcbsp->iclk)) { |
| 1062 | ret = PTR_ERR(mcbsp->iclk); |
| 1063 | dev_err(&pdev->dev, "unable to get ick: %d\n", ret); |
| 1064 | goto err_iclk; |
| 1065 | } |
Stanley.Miao | 0615115 | 2009-01-29 08:57:12 -0800 | [diff] [blame] | 1066 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1067 | mcbsp->fclk = clk_get(&pdev->dev, "fck"); |
| 1068 | if (IS_ERR(mcbsp->fclk)) { |
| 1069 | ret = PTR_ERR(mcbsp->fclk); |
| 1070 | dev_err(&pdev->dev, "unable to get fck: %d\n", ret); |
| 1071 | goto err_fclk; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1072 | } |
| 1073 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1074 | mcbsp->pdata = pdata; |
| 1075 | mcbsp->dev = &pdev->dev; |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1076 | mcbsp_ptr[id] = mcbsp; |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1077 | platform_set_drvdata(pdev, mcbsp); |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1078 | return 0; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1079 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1080 | err_fclk: |
| 1081 | clk_put(mcbsp->iclk); |
| 1082 | err_iclk: |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1083 | iounmap(mcbsp->io_base); |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1084 | err_ioremap: |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1085 | kfree(mcbsp); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1086 | exit: |
| 1087 | return ret; |
| 1088 | } |
| 1089 | |
Uwe Kleine-König | 25cef22 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1090 | static int __devexit omap_mcbsp_remove(struct platform_device *pdev) |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1091 | { |
| 1092 | struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev); |
| 1093 | |
| 1094 | platform_set_drvdata(pdev, NULL); |
| 1095 | if (mcbsp) { |
| 1096 | |
| 1097 | if (mcbsp->pdata && mcbsp->pdata->ops && |
| 1098 | mcbsp->pdata->ops->free) |
| 1099 | mcbsp->pdata->ops->free(mcbsp->id); |
| 1100 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1101 | clk_disable(mcbsp->fclk); |
| 1102 | clk_disable(mcbsp->iclk); |
| 1103 | clk_put(mcbsp->fclk); |
| 1104 | clk_put(mcbsp->iclk); |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1105 | |
Russell King | d592dd1 | 2008-09-04 14:25:42 +0100 | [diff] [blame] | 1106 | iounmap(mcbsp->io_base); |
| 1107 | |
Russell King | b820ce4 | 2009-01-23 10:26:46 +0000 | [diff] [blame] | 1108 | mcbsp->fclk = NULL; |
| 1109 | mcbsp->iclk = NULL; |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1110 | mcbsp->free = 0; |
| 1111 | mcbsp->dev = NULL; |
Tony Lindgren | 5e1c5ff | 2005-07-10 19:58:15 +0100 | [diff] [blame] | 1112 | } |
| 1113 | |
| 1114 | return 0; |
| 1115 | } |
| 1116 | |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1117 | static struct platform_driver omap_mcbsp_driver = { |
| 1118 | .probe = omap_mcbsp_probe, |
Uwe Kleine-König | 25cef22 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 1119 | .remove = __devexit_p(omap_mcbsp_remove), |
Eduardo Valentin | bc5d0c8 | 2008-07-03 12:24:39 +0300 | [diff] [blame] | 1120 | .driver = { |
| 1121 | .name = "omap-mcbsp", |
| 1122 | }, |
| 1123 | }; |
| 1124 | |
| 1125 | int __init omap_mcbsp_init(void) |
| 1126 | { |
| 1127 | /* Register the McBSP driver */ |
| 1128 | return platform_driver_register(&omap_mcbsp_driver); |
| 1129 | } |