Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1 | /* |
| 2 | * File: drivers/ata/pata_bf54x.c |
| 3 | * Author: Sonic Zhang <sonic.zhang@analog.com> |
| 4 | * |
| 5 | * Created: |
| 6 | * Description: PATA Driver for blackfin 54x |
| 7 | * |
| 8 | * Modified: |
| 9 | * Copyright 2007 Analog Devices Inc. |
| 10 | * |
| 11 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, see the file COPYING, or write |
| 25 | * to the Free Software Foundation, Inc., |
| 26 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 27 | */ |
| 28 | |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/blkdev.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/device.h> |
| 36 | #include <scsi/scsi_host.h> |
| 37 | #include <linux/libata.h> |
| 38 | #include <linux/platform_device.h> |
| 39 | #include <asm/dma.h> |
| 40 | #include <asm/gpio.h> |
| 41 | #include <asm/portmux.h> |
| 42 | |
| 43 | #define DRV_NAME "pata-bf54x" |
| 44 | #define DRV_VERSION "0.9" |
| 45 | |
| 46 | #define ATA_REG_CTRL 0x0E |
| 47 | #define ATA_REG_ALTSTATUS ATA_REG_CTRL |
| 48 | |
| 49 | /* These are the offset of the controller's registers */ |
| 50 | #define ATAPI_OFFSET_CONTROL 0x00 |
| 51 | #define ATAPI_OFFSET_STATUS 0x04 |
| 52 | #define ATAPI_OFFSET_DEV_ADDR 0x08 |
| 53 | #define ATAPI_OFFSET_DEV_TXBUF 0x0c |
| 54 | #define ATAPI_OFFSET_DEV_RXBUF 0x10 |
| 55 | #define ATAPI_OFFSET_INT_MASK 0x14 |
| 56 | #define ATAPI_OFFSET_INT_STATUS 0x18 |
| 57 | #define ATAPI_OFFSET_XFER_LEN 0x1c |
| 58 | #define ATAPI_OFFSET_LINE_STATUS 0x20 |
| 59 | #define ATAPI_OFFSET_SM_STATE 0x24 |
| 60 | #define ATAPI_OFFSET_TERMINATE 0x28 |
| 61 | #define ATAPI_OFFSET_PIO_TFRCNT 0x2c |
| 62 | #define ATAPI_OFFSET_DMA_TFRCNT 0x30 |
| 63 | #define ATAPI_OFFSET_UMAIN_TFRCNT 0x34 |
| 64 | #define ATAPI_OFFSET_UDMAOUT_TFRCNT 0x38 |
| 65 | #define ATAPI_OFFSET_REG_TIM_0 0x40 |
| 66 | #define ATAPI_OFFSET_PIO_TIM_0 0x44 |
| 67 | #define ATAPI_OFFSET_PIO_TIM_1 0x48 |
| 68 | #define ATAPI_OFFSET_MULTI_TIM_0 0x50 |
| 69 | #define ATAPI_OFFSET_MULTI_TIM_1 0x54 |
| 70 | #define ATAPI_OFFSET_MULTI_TIM_2 0x58 |
| 71 | #define ATAPI_OFFSET_ULTRA_TIM_0 0x60 |
| 72 | #define ATAPI_OFFSET_ULTRA_TIM_1 0x64 |
| 73 | #define ATAPI_OFFSET_ULTRA_TIM_2 0x68 |
| 74 | #define ATAPI_OFFSET_ULTRA_TIM_3 0x6c |
| 75 | |
| 76 | |
| 77 | #define ATAPI_GET_CONTROL(base)\ |
| 78 | bfin_read16(base + ATAPI_OFFSET_CONTROL) |
| 79 | #define ATAPI_SET_CONTROL(base, val)\ |
| 80 | bfin_write16(base + ATAPI_OFFSET_CONTROL, val) |
| 81 | #define ATAPI_GET_STATUS(base)\ |
| 82 | bfin_read16(base + ATAPI_OFFSET_STATUS) |
| 83 | #define ATAPI_GET_DEV_ADDR(base)\ |
| 84 | bfin_read16(base + ATAPI_OFFSET_DEV_ADDR) |
| 85 | #define ATAPI_SET_DEV_ADDR(base, val)\ |
| 86 | bfin_write16(base + ATAPI_OFFSET_DEV_ADDR, val) |
| 87 | #define ATAPI_GET_DEV_TXBUF(base)\ |
| 88 | bfin_read16(base + ATAPI_OFFSET_DEV_TXBUF) |
| 89 | #define ATAPI_SET_DEV_TXBUF(base, val)\ |
| 90 | bfin_write16(base + ATAPI_OFFSET_DEV_TXBUF, val) |
| 91 | #define ATAPI_GET_DEV_RXBUF(base)\ |
| 92 | bfin_read16(base + ATAPI_OFFSET_DEV_RXBUF) |
| 93 | #define ATAPI_SET_DEV_RXBUF(base, val)\ |
| 94 | bfin_write16(base + ATAPI_OFFSET_DEV_RXBUF, val) |
| 95 | #define ATAPI_GET_INT_MASK(base)\ |
| 96 | bfin_read16(base + ATAPI_OFFSET_INT_MASK) |
| 97 | #define ATAPI_SET_INT_MASK(base, val)\ |
| 98 | bfin_write16(base + ATAPI_OFFSET_INT_MASK, val) |
| 99 | #define ATAPI_GET_INT_STATUS(base)\ |
| 100 | bfin_read16(base + ATAPI_OFFSET_INT_STATUS) |
| 101 | #define ATAPI_SET_INT_STATUS(base, val)\ |
| 102 | bfin_write16(base + ATAPI_OFFSET_INT_STATUS, val) |
| 103 | #define ATAPI_GET_XFER_LEN(base)\ |
| 104 | bfin_read16(base + ATAPI_OFFSET_XFER_LEN) |
| 105 | #define ATAPI_SET_XFER_LEN(base, val)\ |
| 106 | bfin_write16(base + ATAPI_OFFSET_XFER_LEN, val) |
| 107 | #define ATAPI_GET_LINE_STATUS(base)\ |
| 108 | bfin_read16(base + ATAPI_OFFSET_LINE_STATUS) |
| 109 | #define ATAPI_GET_SM_STATE(base)\ |
| 110 | bfin_read16(base + ATAPI_OFFSET_SM_STATE) |
| 111 | #define ATAPI_GET_TERMINATE(base)\ |
| 112 | bfin_read16(base + ATAPI_OFFSET_TERMINATE) |
| 113 | #define ATAPI_SET_TERMINATE(base, val)\ |
| 114 | bfin_write16(base + ATAPI_OFFSET_TERMINATE, val) |
| 115 | #define ATAPI_GET_PIO_TFRCNT(base)\ |
| 116 | bfin_read16(base + ATAPI_OFFSET_PIO_TFRCNT) |
| 117 | #define ATAPI_GET_DMA_TFRCNT(base)\ |
| 118 | bfin_read16(base + ATAPI_OFFSET_DMA_TFRCNT) |
| 119 | #define ATAPI_GET_UMAIN_TFRCNT(base)\ |
| 120 | bfin_read16(base + ATAPI_OFFSET_UMAIN_TFRCNT) |
| 121 | #define ATAPI_GET_UDMAOUT_TFRCNT(base)\ |
| 122 | bfin_read16(base + ATAPI_OFFSET_UDMAOUT_TFRCNT) |
| 123 | #define ATAPI_GET_REG_TIM_0(base)\ |
| 124 | bfin_read16(base + ATAPI_OFFSET_REG_TIM_0) |
| 125 | #define ATAPI_SET_REG_TIM_0(base, val)\ |
| 126 | bfin_write16(base + ATAPI_OFFSET_REG_TIM_0, val) |
| 127 | #define ATAPI_GET_PIO_TIM_0(base)\ |
| 128 | bfin_read16(base + ATAPI_OFFSET_PIO_TIM_0) |
| 129 | #define ATAPI_SET_PIO_TIM_0(base, val)\ |
| 130 | bfin_write16(base + ATAPI_OFFSET_PIO_TIM_0, val) |
| 131 | #define ATAPI_GET_PIO_TIM_1(base)\ |
| 132 | bfin_read16(base + ATAPI_OFFSET_PIO_TIM_1) |
| 133 | #define ATAPI_SET_PIO_TIM_1(base, val)\ |
| 134 | bfin_write16(base + ATAPI_OFFSET_PIO_TIM_1, val) |
| 135 | #define ATAPI_GET_MULTI_TIM_0(base)\ |
| 136 | bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_0) |
| 137 | #define ATAPI_SET_MULTI_TIM_0(base, val)\ |
| 138 | bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_0, val) |
| 139 | #define ATAPI_GET_MULTI_TIM_1(base)\ |
| 140 | bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_1) |
| 141 | #define ATAPI_SET_MULTI_TIM_1(base, val)\ |
| 142 | bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_1, val) |
| 143 | #define ATAPI_GET_MULTI_TIM_2(base)\ |
| 144 | bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_2) |
| 145 | #define ATAPI_SET_MULTI_TIM_2(base, val)\ |
| 146 | bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_2, val) |
| 147 | #define ATAPI_GET_ULTRA_TIM_0(base)\ |
| 148 | bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_0) |
| 149 | #define ATAPI_SET_ULTRA_TIM_0(base, val)\ |
| 150 | bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_0, val) |
| 151 | #define ATAPI_GET_ULTRA_TIM_1(base)\ |
| 152 | bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_1) |
| 153 | #define ATAPI_SET_ULTRA_TIM_1(base, val)\ |
| 154 | bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_1, val) |
| 155 | #define ATAPI_GET_ULTRA_TIM_2(base)\ |
| 156 | bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_2) |
| 157 | #define ATAPI_SET_ULTRA_TIM_2(base, val)\ |
| 158 | bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_2, val) |
| 159 | #define ATAPI_GET_ULTRA_TIM_3(base)\ |
| 160 | bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_3) |
| 161 | #define ATAPI_SET_ULTRA_TIM_3(base, val)\ |
| 162 | bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_3, val) |
| 163 | |
| 164 | /** |
| 165 | * PIO Mode - Frequency compatibility |
| 166 | */ |
| 167 | /* mode: 0 1 2 3 4 */ |
| 168 | static const u32 pio_fsclk[] = |
| 169 | { 33333333, 33333333, 33333333, 33333333, 33333333 }; |
| 170 | |
| 171 | /** |
| 172 | * MDMA Mode - Frequency compatibility |
| 173 | */ |
| 174 | /* mode: 0 1 2 */ |
| 175 | static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 }; |
| 176 | |
| 177 | /** |
| 178 | * UDMA Mode - Frequency compatibility |
| 179 | * |
| 180 | * UDMA5 - 100 MB/s - SCLK = 133 MHz |
| 181 | * UDMA4 - 66 MB/s - SCLK >= 80 MHz |
| 182 | * UDMA3 - 44.4 MB/s - SCLK >= 50 MHz |
| 183 | * UDMA2 - 33 MB/s - SCLK >= 40 MHz |
| 184 | */ |
| 185 | /* mode: 0 1 2 3 4 5 */ |
| 186 | static const u32 udma_fsclk[] = |
| 187 | { 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 }; |
| 188 | |
| 189 | /** |
| 190 | * Register transfer timing table |
| 191 | */ |
| 192 | /* mode: 0 1 2 3 4 */ |
| 193 | /* Cycle Time */ |
| 194 | static const u32 reg_t0min[] = { 600, 383, 330, 180, 120 }; |
| 195 | /* DIOR/DIOW to end cycle */ |
| 196 | static const u32 reg_t2min[] = { 290, 290, 290, 70, 25 }; |
| 197 | /* DIOR/DIOW asserted pulse width */ |
| 198 | static const u32 reg_teocmin[] = { 290, 290, 290, 80, 70 }; |
| 199 | |
| 200 | /** |
| 201 | * PIO timing table |
| 202 | */ |
| 203 | /* mode: 0 1 2 3 4 */ |
| 204 | /* Cycle Time */ |
| 205 | static const u32 pio_t0min[] = { 600, 383, 240, 180, 120 }; |
| 206 | /* Address valid to DIOR/DIORW */ |
| 207 | static const u32 pio_t1min[] = { 70, 50, 30, 30, 25 }; |
| 208 | /* DIOR/DIOW to end cycle */ |
| 209 | static const u32 pio_t2min[] = { 165, 125, 100, 80, 70 }; |
| 210 | /* DIOR/DIOW asserted pulse width */ |
| 211 | static const u32 pio_teocmin[] = { 165, 125, 100, 70, 25 }; |
| 212 | /* DIOW data hold */ |
| 213 | static const u32 pio_t4min[] = { 30, 20, 15, 10, 10 }; |
| 214 | |
| 215 | /* ****************************************************************** |
| 216 | * Multiword DMA timing table |
| 217 | * ****************************************************************** |
| 218 | */ |
| 219 | /* mode: 0 1 2 */ |
| 220 | /* Cycle Time */ |
| 221 | static const u32 mdma_t0min[] = { 480, 150, 120 }; |
| 222 | /* DIOR/DIOW asserted pulse width */ |
| 223 | static const u32 mdma_tdmin[] = { 215, 80, 70 }; |
| 224 | /* DMACK to read data released */ |
| 225 | static const u32 mdma_thmin[] = { 20, 15, 10 }; |
| 226 | /* DIOR/DIOW to DMACK hold */ |
| 227 | static const u32 mdma_tjmin[] = { 20, 5, 5 }; |
| 228 | /* DIOR negated pulse width */ |
| 229 | static const u32 mdma_tkrmin[] = { 50, 50, 25 }; |
| 230 | /* DIOR negated pulse width */ |
| 231 | static const u32 mdma_tkwmin[] = { 215, 50, 25 }; |
| 232 | /* CS[1:0] valid to DIOR/DIOW */ |
| 233 | static const u32 mdma_tmmin[] = { 50, 30, 25 }; |
| 234 | /* DMACK to read data released */ |
| 235 | static const u32 mdma_tzmax[] = { 20, 25, 25 }; |
| 236 | |
| 237 | /** |
| 238 | * Ultra DMA timing table |
| 239 | */ |
| 240 | /* mode: 0 1 2 3 4 5 */ |
| 241 | static const u32 udma_tcycmin[] = { 112, 73, 54, 39, 25, 17 }; |
| 242 | static const u32 udma_tdvsmin[] = { 70, 48, 31, 20, 7, 5 }; |
| 243 | static const u32 udma_tenvmax[] = { 70, 70, 70, 55, 55, 50 }; |
| 244 | static const u32 udma_trpmin[] = { 160, 125, 100, 100, 100, 85 }; |
| 245 | static const u32 udma_tmin[] = { 5, 5, 5, 5, 3, 3 }; |
| 246 | |
| 247 | |
| 248 | static const u32 udma_tmlimin = 20; |
| 249 | static const u32 udma_tzahmin = 20; |
| 250 | static const u32 udma_tenvmin = 20; |
| 251 | static const u32 udma_tackmin = 20; |
| 252 | static const u32 udma_tssmin = 50; |
| 253 | |
| 254 | /** |
| 255 | * |
| 256 | * Function: num_clocks_min |
| 257 | * |
| 258 | * Description: |
| 259 | * calculate number of SCLK cycles to meet minimum timing |
| 260 | */ |
| 261 | static unsigned short num_clocks_min(unsigned long tmin, |
| 262 | unsigned long fsclk) |
| 263 | { |
| 264 | unsigned long tmp ; |
| 265 | unsigned short result; |
| 266 | |
| 267 | tmp = tmin * (fsclk/1000/1000) / 1000; |
| 268 | result = (unsigned short)tmp; |
| 269 | if ((tmp*1000*1000) < (tmin*(fsclk/1000))) { |
| 270 | result++; |
| 271 | } |
| 272 | |
| 273 | return result; |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * bfin_set_piomode - Initialize host controller PATA PIO timings |
| 278 | * @ap: Port whose timings we are configuring |
| 279 | * @adev: um |
| 280 | * |
| 281 | * Set PIO mode for device. |
| 282 | * |
| 283 | * LOCKING: |
| 284 | * None (inherited from caller). |
| 285 | */ |
| 286 | |
| 287 | static void bfin_set_piomode(struct ata_port *ap, struct ata_device *adev) |
| 288 | { |
| 289 | int mode = adev->pio_mode - XFER_PIO_0; |
| 290 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 291 | unsigned int fsclk = get_sclk(); |
| 292 | unsigned short teoc_reg, t2_reg, teoc_pio; |
| 293 | unsigned short t4_reg, t2_pio, t1_reg; |
| 294 | unsigned short n0, n6, t6min = 5; |
| 295 | |
| 296 | /* the most restrictive timing value is t6 and tc, the DIOW - data hold |
| 297 | * If one SCLK pulse is longer than this minimum value then register |
| 298 | * transfers cannot be supported at this frequency. |
| 299 | */ |
| 300 | n6 = num_clocks_min(t6min, fsclk); |
| 301 | if (mode >= 0 && mode <= 4 && n6 >= 1) { |
Bryan Wu | 9f24e82 | 2008-01-30 16:43:28 +0800 | [diff] [blame] | 302 | dev_dbg(adev->link->ap->dev, "set piomode: mode=%d, fsclk=%ud\n", mode, fsclk); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 303 | /* calculate the timing values for register transfers. */ |
| 304 | while (mode > 0 && pio_fsclk[mode] > fsclk) |
| 305 | mode--; |
| 306 | |
| 307 | /* DIOR/DIOW to end cycle time */ |
| 308 | t2_reg = num_clocks_min(reg_t2min[mode], fsclk); |
| 309 | /* DIOR/DIOW asserted pulse width */ |
| 310 | teoc_reg = num_clocks_min(reg_teocmin[mode], fsclk); |
| 311 | /* Cycle Time */ |
| 312 | n0 = num_clocks_min(reg_t0min[mode], fsclk); |
| 313 | |
| 314 | /* increase t2 until we meed the minimum cycle length */ |
| 315 | if (t2_reg + teoc_reg < n0) |
| 316 | t2_reg = n0 - teoc_reg; |
| 317 | |
| 318 | /* calculate the timing values for pio transfers. */ |
| 319 | |
| 320 | /* DIOR/DIOW to end cycle time */ |
| 321 | t2_pio = num_clocks_min(pio_t2min[mode], fsclk); |
| 322 | /* DIOR/DIOW asserted pulse width */ |
| 323 | teoc_pio = num_clocks_min(pio_teocmin[mode], fsclk); |
| 324 | /* Cycle Time */ |
| 325 | n0 = num_clocks_min(pio_t0min[mode], fsclk); |
| 326 | |
| 327 | /* increase t2 until we meed the minimum cycle length */ |
| 328 | if (t2_pio + teoc_pio < n0) |
| 329 | t2_pio = n0 - teoc_pio; |
| 330 | |
| 331 | /* Address valid to DIOR/DIORW */ |
| 332 | t1_reg = num_clocks_min(pio_t1min[mode], fsclk); |
| 333 | |
| 334 | /* DIOW data hold */ |
| 335 | t4_reg = num_clocks_min(pio_t4min[mode], fsclk); |
| 336 | |
| 337 | ATAPI_SET_REG_TIM_0(base, (teoc_reg<<8 | t2_reg)); |
| 338 | ATAPI_SET_PIO_TIM_0(base, (t4_reg<<12 | t2_pio<<4 | t1_reg)); |
| 339 | ATAPI_SET_PIO_TIM_1(base, teoc_pio); |
| 340 | if (mode > 2) { |
| 341 | ATAPI_SET_CONTROL(base, |
| 342 | ATAPI_GET_CONTROL(base) | IORDY_EN); |
| 343 | } else { |
| 344 | ATAPI_SET_CONTROL(base, |
| 345 | ATAPI_GET_CONTROL(base) & ~IORDY_EN); |
| 346 | } |
| 347 | |
| 348 | /* Disable host ATAPI PIO interrupts */ |
| 349 | ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base) |
| 350 | & ~(PIO_DONE_MASK | HOST_TERM_XFER_MASK)); |
| 351 | SSYNC(); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * bfin_set_dmamode - Initialize host controller PATA DMA timings |
| 357 | * @ap: Port whose timings we are configuring |
| 358 | * @adev: um |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 359 | * |
| 360 | * Set UDMA mode for device. |
| 361 | * |
| 362 | * LOCKING: |
| 363 | * None (inherited from caller). |
| 364 | */ |
| 365 | |
| 366 | static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
| 367 | { |
| 368 | int mode; |
| 369 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 370 | unsigned long fsclk = get_sclk(); |
| 371 | unsigned short tenv, tack, tcyc_tdvs, tdvs, tmli, tss, trp, tzah; |
| 372 | unsigned short tm, td, tkr, tkw, teoc, th; |
| 373 | unsigned short n0, nf, tfmin = 5; |
| 374 | unsigned short nmin, tcyc; |
| 375 | |
| 376 | mode = adev->dma_mode - XFER_UDMA_0; |
| 377 | if (mode >= 0 && mode <= 5) { |
Bryan Wu | 9f24e82 | 2008-01-30 16:43:28 +0800 | [diff] [blame] | 378 | dev_dbg(adev->link->ap->dev, "set udmamode: mode=%d\n", mode); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 379 | /* the most restrictive timing value is t6 and tc, |
| 380 | * the DIOW - data hold. If one SCLK pulse is longer |
| 381 | * than this minimum value then register |
| 382 | * transfers cannot be supported at this frequency. |
| 383 | */ |
| 384 | while (mode > 0 && udma_fsclk[mode] > fsclk) |
| 385 | mode--; |
| 386 | |
| 387 | nmin = num_clocks_min(udma_tmin[mode], fsclk); |
| 388 | if (nmin >= 1) { |
| 389 | /* calculate the timing values for Ultra DMA. */ |
| 390 | tdvs = num_clocks_min(udma_tdvsmin[mode], fsclk); |
| 391 | tcyc = num_clocks_min(udma_tcycmin[mode], fsclk); |
| 392 | tcyc_tdvs = 2; |
| 393 | |
| 394 | /* increase tcyc - tdvs (tcyc_tdvs) until we meed |
| 395 | * the minimum cycle length |
| 396 | */ |
| 397 | if (tdvs + tcyc_tdvs < tcyc) |
| 398 | tcyc_tdvs = tcyc - tdvs; |
| 399 | |
| 400 | /* Mow assign the values required for the timing |
| 401 | * registers |
| 402 | */ |
| 403 | if (tcyc_tdvs < 2) |
| 404 | tcyc_tdvs = 2; |
| 405 | |
| 406 | if (tdvs < 2) |
| 407 | tdvs = 2; |
| 408 | |
| 409 | tack = num_clocks_min(udma_tackmin, fsclk); |
| 410 | tss = num_clocks_min(udma_tssmin, fsclk); |
| 411 | tmli = num_clocks_min(udma_tmlimin, fsclk); |
| 412 | tzah = num_clocks_min(udma_tzahmin, fsclk); |
| 413 | trp = num_clocks_min(udma_trpmin[mode], fsclk); |
| 414 | tenv = num_clocks_min(udma_tenvmin, fsclk); |
| 415 | if (tenv <= udma_tenvmax[mode]) { |
| 416 | ATAPI_SET_ULTRA_TIM_0(base, (tenv<<8 | tack)); |
| 417 | ATAPI_SET_ULTRA_TIM_1(base, |
| 418 | (tcyc_tdvs<<8 | tdvs)); |
| 419 | ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss)); |
| 420 | ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah)); |
| 421 | |
| 422 | /* Enable host ATAPI Untra DMA interrupts */ |
| 423 | ATAPI_SET_INT_MASK(base, |
| 424 | ATAPI_GET_INT_MASK(base) |
| 425 | | UDMAIN_DONE_MASK |
| 426 | | UDMAOUT_DONE_MASK |
| 427 | | UDMAIN_TERM_MASK |
| 428 | | UDMAOUT_TERM_MASK); |
| 429 | } |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | mode = adev->dma_mode - XFER_MW_DMA_0; |
| 434 | if (mode >= 0 && mode <= 2) { |
Bryan Wu | 9f24e82 | 2008-01-30 16:43:28 +0800 | [diff] [blame] | 435 | dev_dbg(adev->link->ap->dev, "set mdmamode: mode=%d\n", mode); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 436 | /* the most restrictive timing value is tf, the DMACK to |
| 437 | * read data released. If one SCLK pulse is longer than |
| 438 | * this maximum value then the MDMA mode |
| 439 | * cannot be supported at this frequency. |
| 440 | */ |
| 441 | while (mode > 0 && mdma_fsclk[mode] > fsclk) |
| 442 | mode--; |
| 443 | |
| 444 | nf = num_clocks_min(tfmin, fsclk); |
| 445 | if (nf >= 1) { |
| 446 | /* calculate the timing values for Multi-word DMA. */ |
| 447 | |
| 448 | /* DIOR/DIOW asserted pulse width */ |
| 449 | td = num_clocks_min(mdma_tdmin[mode], fsclk); |
| 450 | |
| 451 | /* DIOR negated pulse width */ |
| 452 | tkw = num_clocks_min(mdma_tkwmin[mode], fsclk); |
| 453 | |
| 454 | /* Cycle Time */ |
| 455 | n0 = num_clocks_min(mdma_t0min[mode], fsclk); |
| 456 | |
| 457 | /* increase tk until we meed the minimum cycle length */ |
| 458 | if (tkw + td < n0) |
| 459 | tkw = n0 - td; |
| 460 | |
| 461 | /* DIOR negated pulse width - read */ |
| 462 | tkr = num_clocks_min(mdma_tkrmin[mode], fsclk); |
| 463 | /* CS{1:0] valid to DIOR/DIOW */ |
| 464 | tm = num_clocks_min(mdma_tmmin[mode], fsclk); |
| 465 | /* DIOR/DIOW to DMACK hold */ |
| 466 | teoc = num_clocks_min(mdma_tjmin[mode], fsclk); |
| 467 | /* DIOW Data hold */ |
| 468 | th = num_clocks_min(mdma_thmin[mode], fsclk); |
| 469 | |
| 470 | ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td)); |
| 471 | ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw)); |
| 472 | ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th)); |
| 473 | |
| 474 | /* Enable host ATAPI Multi DMA interrupts */ |
| 475 | ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base) |
| 476 | | MULTI_DONE_MASK | MULTI_TERM_MASK); |
| 477 | SSYNC(); |
| 478 | } |
| 479 | } |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | /** |
| 484 | * |
| 485 | * Function: wait_complete |
| 486 | * |
| 487 | * Description: Waits the interrupt from device |
| 488 | * |
| 489 | */ |
| 490 | static inline void wait_complete(void __iomem *base, unsigned short mask) |
| 491 | { |
| 492 | unsigned short status; |
| 493 | unsigned int i = 0; |
| 494 | |
| 495 | #define PATA_BF54X_WAIT_TIMEOUT 10000 |
| 496 | |
| 497 | for (i = 0; i < PATA_BF54X_WAIT_TIMEOUT; i++) { |
| 498 | status = ATAPI_GET_INT_STATUS(base) & mask; |
| 499 | if (status) |
| 500 | break; |
| 501 | } |
| 502 | |
| 503 | ATAPI_SET_INT_STATUS(base, mask); |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * |
| 508 | * Function: write_atapi_register |
| 509 | * |
| 510 | * Description: Writes to ATA Device Resgister |
| 511 | * |
| 512 | */ |
| 513 | |
| 514 | static void write_atapi_register(void __iomem *base, |
| 515 | unsigned long ata_reg, unsigned short value) |
| 516 | { |
| 517 | /* Program the ATA_DEV_TXBUF register with write data (to be |
| 518 | * written into the device). |
| 519 | */ |
| 520 | ATAPI_SET_DEV_TXBUF(base, value); |
| 521 | |
| 522 | /* Program the ATA_DEV_ADDR register with address of the |
| 523 | * device register (0x01 to 0x0F). |
| 524 | */ |
| 525 | ATAPI_SET_DEV_ADDR(base, ata_reg); |
| 526 | |
| 527 | /* Program the ATA_CTRL register with dir set to write (1) |
| 528 | */ |
| 529 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR)); |
| 530 | |
| 531 | /* ensure PIO DMA is not set */ |
| 532 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA)); |
| 533 | |
| 534 | /* and start the transfer */ |
| 535 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START)); |
| 536 | |
| 537 | /* Wait for the interrupt to indicate the end of the transfer. |
| 538 | * (We need to wait on and clear rhe ATA_DEV_INT interrupt status) |
| 539 | */ |
| 540 | wait_complete(base, PIO_DONE_INT); |
| 541 | } |
| 542 | |
| 543 | /** |
| 544 | * |
| 545 | * Function: read_atapi_register |
| 546 | * |
| 547 | *Description: Reads from ATA Device Resgister |
| 548 | * |
| 549 | */ |
| 550 | |
| 551 | static unsigned short read_atapi_register(void __iomem *base, |
| 552 | unsigned long ata_reg) |
| 553 | { |
| 554 | /* Program the ATA_DEV_ADDR register with address of the |
| 555 | * device register (0x01 to 0x0F). |
| 556 | */ |
| 557 | ATAPI_SET_DEV_ADDR(base, ata_reg); |
| 558 | |
| 559 | /* Program the ATA_CTRL register with dir set to read (0) and |
| 560 | */ |
| 561 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR)); |
| 562 | |
| 563 | /* ensure PIO DMA is not set */ |
| 564 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA)); |
| 565 | |
| 566 | /* and start the transfer */ |
| 567 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START)); |
| 568 | |
| 569 | /* Wait for the interrupt to indicate the end of the transfer. |
| 570 | * (PIO_DONE interrupt is set and it doesn't seem to matter |
| 571 | * that we don't clear it) |
| 572 | */ |
| 573 | wait_complete(base, PIO_DONE_INT); |
| 574 | |
| 575 | /* Read the ATA_DEV_RXBUF register with write data (to be |
| 576 | * written into the device). |
| 577 | */ |
| 578 | return ATAPI_GET_DEV_RXBUF(base); |
| 579 | } |
| 580 | |
| 581 | /** |
| 582 | * |
| 583 | * Function: write_atapi_register_data |
| 584 | * |
| 585 | * Description: Writes to ATA Device Resgister |
| 586 | * |
| 587 | */ |
| 588 | |
| 589 | static void write_atapi_data(void __iomem *base, |
| 590 | int len, unsigned short *buf) |
| 591 | { |
| 592 | int i; |
| 593 | |
| 594 | /* Set transfer length to 1 */ |
| 595 | ATAPI_SET_XFER_LEN(base, 1); |
| 596 | |
| 597 | /* Program the ATA_DEV_ADDR register with address of the |
| 598 | * ATA_REG_DATA |
| 599 | */ |
| 600 | ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA); |
| 601 | |
| 602 | /* Program the ATA_CTRL register with dir set to write (1) |
| 603 | */ |
| 604 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR)); |
| 605 | |
| 606 | /* ensure PIO DMA is not set */ |
| 607 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA)); |
| 608 | |
| 609 | for (i = 0; i < len; i++) { |
| 610 | /* Program the ATA_DEV_TXBUF register with write data (to be |
| 611 | * written into the device). |
| 612 | */ |
| 613 | ATAPI_SET_DEV_TXBUF(base, buf[i]); |
| 614 | |
| 615 | /* and start the transfer */ |
| 616 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START)); |
| 617 | |
| 618 | /* Wait for the interrupt to indicate the end of the transfer. |
| 619 | * (We need to wait on and clear rhe ATA_DEV_INT |
| 620 | * interrupt status) |
| 621 | */ |
| 622 | wait_complete(base, PIO_DONE_INT); |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /** |
| 627 | * |
| 628 | * Function: read_atapi_register_data |
| 629 | * |
| 630 | * Description: Reads from ATA Device Resgister |
| 631 | * |
| 632 | */ |
| 633 | |
| 634 | static void read_atapi_data(void __iomem *base, |
| 635 | int len, unsigned short *buf) |
| 636 | { |
| 637 | int i; |
| 638 | |
| 639 | /* Set transfer length to 1 */ |
| 640 | ATAPI_SET_XFER_LEN(base, 1); |
| 641 | |
| 642 | /* Program the ATA_DEV_ADDR register with address of the |
| 643 | * ATA_REG_DATA |
| 644 | */ |
| 645 | ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA); |
| 646 | |
| 647 | /* Program the ATA_CTRL register with dir set to read (0) and |
| 648 | */ |
| 649 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR)); |
| 650 | |
| 651 | /* ensure PIO DMA is not set */ |
| 652 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA)); |
| 653 | |
| 654 | for (i = 0; i < len; i++) { |
| 655 | /* and start the transfer */ |
| 656 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START)); |
| 657 | |
| 658 | /* Wait for the interrupt to indicate the end of the transfer. |
| 659 | * (PIO_DONE interrupt is set and it doesn't seem to matter |
| 660 | * that we don't clear it) |
| 661 | */ |
| 662 | wait_complete(base, PIO_DONE_INT); |
| 663 | |
| 664 | /* Read the ATA_DEV_RXBUF register with write data (to be |
| 665 | * written into the device). |
| 666 | */ |
| 667 | buf[i] = ATAPI_GET_DEV_RXBUF(base); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | /** |
| 672 | * bfin_tf_load - send taskfile registers to host controller |
| 673 | * @ap: Port to which output is sent |
| 674 | * @tf: ATA taskfile register set |
| 675 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 676 | * Note: Original code is ata_sff_tf_load(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 677 | */ |
| 678 | |
| 679 | static void bfin_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
| 680 | { |
| 681 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 682 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 683 | |
| 684 | if (tf->ctl != ap->last_ctl) { |
| 685 | write_atapi_register(base, ATA_REG_CTRL, tf->ctl); |
| 686 | ap->last_ctl = tf->ctl; |
| 687 | ata_wait_idle(ap); |
| 688 | } |
| 689 | |
| 690 | if (is_addr) { |
| 691 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 692 | write_atapi_register(base, ATA_REG_FEATURE, |
| 693 | tf->hob_feature); |
| 694 | write_atapi_register(base, ATA_REG_NSECT, |
| 695 | tf->hob_nsect); |
| 696 | write_atapi_register(base, ATA_REG_LBAL, tf->hob_lbal); |
| 697 | write_atapi_register(base, ATA_REG_LBAM, tf->hob_lbam); |
| 698 | write_atapi_register(base, ATA_REG_LBAH, tf->hob_lbah); |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 699 | dev_dbg(ap->dev, "hob: feat 0x%X nsect 0x%X, lba 0x%X " |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 700 | "0x%X 0x%X\n", |
| 701 | tf->hob_feature, |
| 702 | tf->hob_nsect, |
| 703 | tf->hob_lbal, |
| 704 | tf->hob_lbam, |
| 705 | tf->hob_lbah); |
| 706 | } |
| 707 | |
| 708 | write_atapi_register(base, ATA_REG_FEATURE, tf->feature); |
| 709 | write_atapi_register(base, ATA_REG_NSECT, tf->nsect); |
| 710 | write_atapi_register(base, ATA_REG_LBAL, tf->lbal); |
| 711 | write_atapi_register(base, ATA_REG_LBAM, tf->lbam); |
| 712 | write_atapi_register(base, ATA_REG_LBAH, tf->lbah); |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 713 | dev_dbg(ap->dev, "feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 714 | tf->feature, |
| 715 | tf->nsect, |
| 716 | tf->lbal, |
| 717 | tf->lbam, |
| 718 | tf->lbah); |
| 719 | } |
| 720 | |
| 721 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 722 | write_atapi_register(base, ATA_REG_DEVICE, tf->device); |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 723 | dev_dbg(ap->dev, "device 0x%X\n", tf->device); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | ata_wait_idle(ap); |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * bfin_check_status - Read device status reg & clear interrupt |
| 731 | * @ap: port where the device is |
| 732 | * |
| 733 | * Note: Original code is ata_check_status(). |
| 734 | */ |
| 735 | |
| 736 | static u8 bfin_check_status(struct ata_port *ap) |
| 737 | { |
| 738 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 739 | return read_atapi_register(base, ATA_REG_STATUS); |
| 740 | } |
| 741 | |
| 742 | /** |
| 743 | * bfin_tf_read - input device's ATA taskfile shadow registers |
| 744 | * @ap: Port from which input is read |
| 745 | * @tf: ATA taskfile register set for storing input |
| 746 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 747 | * Note: Original code is ata_sff_tf_read(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 748 | */ |
| 749 | |
| 750 | static void bfin_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
| 751 | { |
| 752 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 753 | |
| 754 | tf->command = bfin_check_status(ap); |
| 755 | tf->feature = read_atapi_register(base, ATA_REG_ERR); |
| 756 | tf->nsect = read_atapi_register(base, ATA_REG_NSECT); |
| 757 | tf->lbal = read_atapi_register(base, ATA_REG_LBAL); |
| 758 | tf->lbam = read_atapi_register(base, ATA_REG_LBAM); |
| 759 | tf->lbah = read_atapi_register(base, ATA_REG_LBAH); |
| 760 | tf->device = read_atapi_register(base, ATA_REG_DEVICE); |
| 761 | |
| 762 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 763 | write_atapi_register(base, ATA_REG_CTRL, tf->ctl | ATA_HOB); |
| 764 | tf->hob_feature = read_atapi_register(base, ATA_REG_ERR); |
| 765 | tf->hob_nsect = read_atapi_register(base, ATA_REG_NSECT); |
| 766 | tf->hob_lbal = read_atapi_register(base, ATA_REG_LBAL); |
| 767 | tf->hob_lbam = read_atapi_register(base, ATA_REG_LBAM); |
| 768 | tf->hob_lbah = read_atapi_register(base, ATA_REG_LBAH); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | /** |
| 773 | * bfin_exec_command - issue ATA command to host controller |
| 774 | * @ap: port to which command is being issued |
| 775 | * @tf: ATA taskfile register set |
| 776 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 777 | * Note: Original code is ata_sff_exec_command(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 778 | */ |
| 779 | |
| 780 | static void bfin_exec_command(struct ata_port *ap, |
| 781 | const struct ata_taskfile *tf) |
| 782 | { |
| 783 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 784 | dev_dbg(ap->dev, "ata%u: cmd 0x%X\n", ap->print_id, tf->command); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 785 | |
| 786 | write_atapi_register(base, ATA_REG_CMD, tf->command); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 787 | ata_sff_pause(ap); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | /** |
| 791 | * bfin_check_altstatus - Read device alternate status reg |
| 792 | * @ap: port where the device is |
| 793 | */ |
| 794 | |
| 795 | static u8 bfin_check_altstatus(struct ata_port *ap) |
| 796 | { |
| 797 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 798 | return read_atapi_register(base, ATA_REG_ALTSTATUS); |
| 799 | } |
| 800 | |
| 801 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 802 | * bfin_dev_select - Select device 0/1 on ATA bus |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 803 | * @ap: ATA channel to manipulate |
| 804 | * @device: ATA device (numbered from zero) to select |
| 805 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 806 | * Note: Original code is ata_sff_dev_select(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 807 | */ |
| 808 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 809 | static void bfin_dev_select(struct ata_port *ap, unsigned int device) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 810 | { |
| 811 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 812 | u8 tmp; |
| 813 | |
| 814 | if (device == 0) |
| 815 | tmp = ATA_DEVICE_OBS; |
| 816 | else |
| 817 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 818 | |
| 819 | write_atapi_register(base, ATA_REG_DEVICE, tmp); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 820 | ata_sff_pause(ap); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | /** |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 824 | * bfin_set_devctl - Write device control reg |
| 825 | * @ap: port where the device is |
| 826 | * @ctl: value to write |
| 827 | */ |
| 828 | |
Mike Frysinger | c069573 | 2010-10-21 04:00:40 -0400 | [diff] [blame] | 829 | static void bfin_set_devctl(struct ata_port *ap, u8 ctl) |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 830 | { |
| 831 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 832 | write_atapi_register(base, ATA_REG_CTRL, ctl); |
| 833 | } |
| 834 | |
| 835 | /** |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 836 | * bfin_bmdma_setup - Set up IDE DMA transaction |
| 837 | * @qc: Info associated with this ATA transaction. |
| 838 | * |
| 839 | * Note: Original code is ata_bmdma_setup(). |
| 840 | */ |
| 841 | |
| 842 | static void bfin_bmdma_setup(struct ata_queued_cmd *qc) |
| 843 | { |
| 844 | unsigned short config = WDSIZE_16; |
| 845 | struct scatterlist *sg; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 846 | unsigned int si; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 847 | |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 848 | dev_dbg(qc->ap->dev, "in atapi dma setup\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 849 | /* Program the ATA_CTRL register with dir */ |
| 850 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 851 | /* fill the ATAPI DMA controller */ |
| 852 | set_dma_config(CH_ATAPI_TX, config); |
| 853 | set_dma_x_modify(CH_ATAPI_TX, 2); |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 854 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 855 | set_dma_start_addr(CH_ATAPI_TX, sg_dma_address(sg)); |
| 856 | set_dma_x_count(CH_ATAPI_TX, sg_dma_len(sg) >> 1); |
| 857 | } |
| 858 | } else { |
| 859 | config |= WNR; |
| 860 | /* fill the ATAPI DMA controller */ |
| 861 | set_dma_config(CH_ATAPI_RX, config); |
| 862 | set_dma_x_modify(CH_ATAPI_RX, 2); |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 863 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 864 | set_dma_start_addr(CH_ATAPI_RX, sg_dma_address(sg)); |
| 865 | set_dma_x_count(CH_ATAPI_RX, sg_dma_len(sg) >> 1); |
| 866 | } |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | /** |
| 871 | * bfin_bmdma_start - Start an IDE DMA transaction |
| 872 | * @qc: Info associated with this ATA transaction. |
| 873 | * |
| 874 | * Note: Original code is ata_bmdma_start(). |
| 875 | */ |
| 876 | |
| 877 | static void bfin_bmdma_start(struct ata_queued_cmd *qc) |
| 878 | { |
| 879 | struct ata_port *ap = qc->ap; |
| 880 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 881 | struct scatterlist *sg; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 882 | unsigned int si; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 883 | |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 884 | dev_dbg(qc->ap->dev, "in atapi dma start\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 885 | if (!(ap->udma_mask || ap->mwdma_mask)) |
| 886 | return; |
| 887 | |
| 888 | /* start ATAPI DMA controller*/ |
| 889 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 890 | /* |
| 891 | * On blackfin arch, uncacheable memory is not |
| 892 | * allocated with flag GFP_DMA. DMA buffer from |
| 893 | * common kenel code should be flushed if WB |
| 894 | * data cache is enabled. Otherwise, this loop |
| 895 | * is an empty loop and optimized out. |
| 896 | */ |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 897 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 898 | flush_dcache_range(sg_dma_address(sg), |
| 899 | sg_dma_address(sg) + sg_dma_len(sg)); |
| 900 | } |
| 901 | enable_dma(CH_ATAPI_TX); |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 902 | dev_dbg(qc->ap->dev, "enable udma write\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 903 | |
| 904 | /* Send ATA DMA write command */ |
| 905 | bfin_exec_command(ap, &qc->tf); |
| 906 | |
| 907 | /* set ATA DMA write direction */ |
| 908 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) |
| 909 | | XFER_DIR)); |
| 910 | } else { |
| 911 | enable_dma(CH_ATAPI_RX); |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 912 | dev_dbg(qc->ap->dev, "enable udma read\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 913 | |
| 914 | /* Send ATA DMA read command */ |
| 915 | bfin_exec_command(ap, &qc->tf); |
| 916 | |
| 917 | /* set ATA DMA read direction */ |
| 918 | ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) |
| 919 | & ~XFER_DIR)); |
| 920 | } |
| 921 | |
| 922 | /* Reset all transfer count */ |
| 923 | ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST); |
| 924 | |
Sonic Zhang | b6e7b44 | 2008-05-12 12:12:16 +0800 | [diff] [blame] | 925 | /* Set ATAPI state machine contorl in terminate sequence */ |
| 926 | ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | END_ON_TERM); |
| 927 | |
| 928 | /* Set transfer length to buffer len */ |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 929 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 930 | ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1)); |
| 931 | } |
| 932 | |
| 933 | /* Enable ATA DMA operation*/ |
| 934 | if (ap->udma_mask) |
| 935 | ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) |
| 936 | | ULTRA_START); |
| 937 | else |
| 938 | ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) |
| 939 | | MULTI_START); |
| 940 | } |
| 941 | |
| 942 | /** |
| 943 | * bfin_bmdma_stop - Stop IDE DMA transfer |
| 944 | * @qc: Command we are ending DMA for |
| 945 | */ |
| 946 | |
| 947 | static void bfin_bmdma_stop(struct ata_queued_cmd *qc) |
| 948 | { |
| 949 | struct ata_port *ap = qc->ap; |
| 950 | struct scatterlist *sg; |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 951 | unsigned int si; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 952 | |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 953 | dev_dbg(qc->ap->dev, "in atapi dma stop\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 954 | if (!(ap->udma_mask || ap->mwdma_mask)) |
| 955 | return; |
| 956 | |
| 957 | /* stop ATAPI DMA controller*/ |
| 958 | if (qc->tf.flags & ATA_TFLAG_WRITE) |
| 959 | disable_dma(CH_ATAPI_TX); |
| 960 | else { |
| 961 | disable_dma(CH_ATAPI_RX); |
| 962 | if (ap->hsm_task_state & HSM_ST_LAST) { |
| 963 | /* |
| 964 | * On blackfin arch, uncacheable memory is not |
| 965 | * allocated with flag GFP_DMA. DMA buffer from |
| 966 | * common kenel code should be invalidated if |
| 967 | * data cache is enabled. Otherwise, this loop |
| 968 | * is an empty loop and optimized out. |
| 969 | */ |
Tejun Heo | ff2aeb1 | 2007-12-05 16:43:11 +0900 | [diff] [blame] | 970 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 971 | invalidate_dcache_range( |
| 972 | sg_dma_address(sg), |
| 973 | sg_dma_address(sg) |
| 974 | + sg_dma_len(sg)); |
| 975 | } |
| 976 | } |
| 977 | } |
| 978 | } |
| 979 | |
| 980 | /** |
| 981 | * bfin_devchk - PATA device presence detection |
| 982 | * @ap: ATA channel to examine |
| 983 | * @device: Device to examine (starting at zero) |
| 984 | * |
| 985 | * Note: Original code is ata_devchk(). |
| 986 | */ |
| 987 | |
| 988 | static unsigned int bfin_devchk(struct ata_port *ap, |
| 989 | unsigned int device) |
| 990 | { |
| 991 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 992 | u8 nsect, lbal; |
| 993 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 994 | bfin_dev_select(ap, device); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 995 | |
| 996 | write_atapi_register(base, ATA_REG_NSECT, 0x55); |
| 997 | write_atapi_register(base, ATA_REG_LBAL, 0xaa); |
| 998 | |
| 999 | write_atapi_register(base, ATA_REG_NSECT, 0xaa); |
| 1000 | write_atapi_register(base, ATA_REG_LBAL, 0x55); |
| 1001 | |
| 1002 | write_atapi_register(base, ATA_REG_NSECT, 0x55); |
| 1003 | write_atapi_register(base, ATA_REG_LBAL, 0xaa); |
| 1004 | |
| 1005 | nsect = read_atapi_register(base, ATA_REG_NSECT); |
| 1006 | lbal = read_atapi_register(base, ATA_REG_LBAL); |
| 1007 | |
| 1008 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 1009 | return 1; /* we found a device */ |
| 1010 | |
| 1011 | return 0; /* nothing found */ |
| 1012 | } |
| 1013 | |
| 1014 | /** |
| 1015 | * bfin_bus_post_reset - PATA device post reset |
| 1016 | * |
| 1017 | * Note: Original code is ata_bus_post_reset(). |
| 1018 | */ |
| 1019 | |
| 1020 | static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask) |
| 1021 | { |
| 1022 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 1023 | unsigned int dev0 = devmask & (1 << 0); |
| 1024 | unsigned int dev1 = devmask & (1 << 1); |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 1025 | unsigned long deadline; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1026 | |
| 1027 | /* if device 0 was found in ata_devchk, wait for its |
| 1028 | * BSY bit to clear |
| 1029 | */ |
| 1030 | if (dev0) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1031 | ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1032 | |
| 1033 | /* if device 1 was found in ata_devchk, wait for |
| 1034 | * register access, then wait for BSY to clear |
| 1035 | */ |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 1036 | deadline = ata_deadline(jiffies, ATA_TMOUT_BOOT); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1037 | while (dev1) { |
| 1038 | u8 nsect, lbal; |
| 1039 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1040 | bfin_dev_select(ap, 1); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1041 | nsect = read_atapi_register(base, ATA_REG_NSECT); |
| 1042 | lbal = read_atapi_register(base, ATA_REG_LBAL); |
| 1043 | if ((nsect == 1) && (lbal == 1)) |
| 1044 | break; |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 1045 | if (time_after(jiffies, deadline)) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1046 | dev1 = 0; |
| 1047 | break; |
| 1048 | } |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 1049 | ata_msleep(ap, 50); /* give drive a breather */ |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1050 | } |
| 1051 | if (dev1) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1052 | ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1053 | |
| 1054 | /* is all this really necessary? */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1055 | bfin_dev_select(ap, 0); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1056 | if (dev1) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1057 | bfin_dev_select(ap, 1); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1058 | if (dev0) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1059 | bfin_dev_select(ap, 0); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1060 | } |
| 1061 | |
| 1062 | /** |
| 1063 | * bfin_bus_softreset - PATA device software reset |
| 1064 | * |
| 1065 | * Note: Original code is ata_bus_softreset(). |
| 1066 | */ |
| 1067 | |
| 1068 | static unsigned int bfin_bus_softreset(struct ata_port *ap, |
| 1069 | unsigned int devmask) |
| 1070 | { |
| 1071 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 1072 | |
| 1073 | /* software reset. causes dev0 to be selected */ |
| 1074 | write_atapi_register(base, ATA_REG_CTRL, ap->ctl); |
| 1075 | udelay(20); |
| 1076 | write_atapi_register(base, ATA_REG_CTRL, ap->ctl | ATA_SRST); |
| 1077 | udelay(20); |
| 1078 | write_atapi_register(base, ATA_REG_CTRL, ap->ctl); |
| 1079 | |
| 1080 | /* spec mandates ">= 2ms" before checking status. |
| 1081 | * We wait 150ms, because that was the magic delay used for |
| 1082 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time |
| 1083 | * between when the ATA command register is written, and then |
| 1084 | * status is checked. Because waiting for "a while" before |
| 1085 | * checking status is fine, post SRST, we perform this magic |
| 1086 | * delay here as well. |
| 1087 | * |
| 1088 | * Old drivers/ide uses the 2mS rule and then waits for ready |
| 1089 | */ |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 1090 | ata_msleep(ap, 150); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1091 | |
| 1092 | /* Before we perform post reset processing we want to see if |
| 1093 | * the bus shows 0xFF because the odd clown forgets the D7 |
| 1094 | * pulldown resistor. |
| 1095 | */ |
| 1096 | if (bfin_check_status(ap) == 0xFF) |
| 1097 | return 0; |
| 1098 | |
| 1099 | bfin_bus_post_reset(ap, devmask); |
| 1100 | |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1105 | * bfin_softreset - reset host port via ATA SRST |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1106 | * @ap: port to reset |
| 1107 | * @classes: resulting classes of attached devices |
| 1108 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1109 | * Note: Original code is ata_sff_softreset(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1110 | */ |
| 1111 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1112 | static int bfin_softreset(struct ata_link *link, unsigned int *classes, |
| 1113 | unsigned long deadline) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1114 | { |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1115 | struct ata_port *ap = link->ap; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1116 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 1117 | unsigned int devmask = 0, err_mask; |
| 1118 | u8 err; |
| 1119 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1120 | /* determine if device 0/1 are present */ |
| 1121 | if (bfin_devchk(ap, 0)) |
| 1122 | devmask |= (1 << 0); |
| 1123 | if (slave_possible && bfin_devchk(ap, 1)) |
| 1124 | devmask |= (1 << 1); |
| 1125 | |
| 1126 | /* select device 0 again */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1127 | bfin_dev_select(ap, 0); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1128 | |
| 1129 | /* issue bus reset */ |
| 1130 | err_mask = bfin_bus_softreset(ap, devmask); |
| 1131 | if (err_mask) { |
| 1132 | ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", |
| 1133 | err_mask); |
| 1134 | return -EIO; |
| 1135 | } |
| 1136 | |
| 1137 | /* determine by signature whether we have ATA or ATAPI devices */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1138 | classes[0] = ata_sff_dev_classify(&ap->link.device[0], |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1139 | devmask & (1 << 0), &err); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1140 | if (slave_possible && err != 0x81) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1141 | classes[1] = ata_sff_dev_classify(&ap->link.device[1], |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1142 | devmask & (1 << 1), &err); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1143 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1144 | return 0; |
| 1145 | } |
| 1146 | |
| 1147 | /** |
| 1148 | * bfin_bmdma_status - Read IDE DMA status |
| 1149 | * @ap: Port associated with this ATA transaction. |
| 1150 | */ |
| 1151 | |
| 1152 | static unsigned char bfin_bmdma_status(struct ata_port *ap) |
| 1153 | { |
| 1154 | unsigned char host_stat = 0; |
| 1155 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 1156 | unsigned short int_status = ATAPI_GET_INT_STATUS(base); |
| 1157 | |
Sonic Zhang | 30d849c | 2008-01-30 16:43:27 +0800 | [diff] [blame] | 1158 | if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON|ULTRA_XFER_ON)) |
sonic zhang | dc86f6d | 2007-11-26 17:50:56 +0800 | [diff] [blame] | 1159 | host_stat |= ATA_DMA_ACTIVE; |
Sonic Zhang | 30d849c | 2008-01-30 16:43:27 +0800 | [diff] [blame] | 1160 | if (int_status & (MULTI_DONE_INT|UDMAIN_DONE_INT|UDMAOUT_DONE_INT| |
| 1161 | ATAPI_DEV_INT)) |
sonic zhang | dc86f6d | 2007-11-26 17:50:56 +0800 | [diff] [blame] | 1162 | host_stat |= ATA_DMA_INTR; |
Sonic Zhang | 30d849c | 2008-01-30 16:43:27 +0800 | [diff] [blame] | 1163 | if (int_status & (MULTI_TERM_INT|UDMAIN_TERM_INT|UDMAOUT_TERM_INT)) |
| 1164 | host_stat |= ATA_DMA_ERR|ATA_DMA_INTR; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1165 | |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 1166 | dev_dbg(ap->dev, "ATAPI: host_stat=0x%x\n", host_stat); |
| 1167 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1168 | return host_stat; |
| 1169 | } |
| 1170 | |
| 1171 | /** |
| 1172 | * bfin_data_xfer - Transfer data by PIO |
| 1173 | * @adev: device for this I/O |
| 1174 | * @buf: data buffer |
| 1175 | * @buflen: buffer length |
| 1176 | * @write_data: read/write |
| 1177 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1178 | * Note: Original code is ata_sff_data_xfer(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1179 | */ |
| 1180 | |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1181 | static unsigned int bfin_data_xfer(struct ata_device *dev, unsigned char *buf, |
| 1182 | unsigned int buflen, int rw) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1183 | { |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1184 | struct ata_port *ap = dev->link->ap; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1185 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1186 | unsigned int words = buflen >> 1; |
| 1187 | unsigned short *buf16 = (u16 *)buf; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1188 | |
| 1189 | /* Transfer multiple of 2 bytes */ |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1190 | if (rw == READ) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1191 | read_atapi_data(base, words, buf16); |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1192 | else |
| 1193 | write_atapi_data(base, words, buf16); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1194 | |
| 1195 | /* Transfer trailing 1 byte, if any. */ |
| 1196 | if (unlikely(buflen & 0x01)) { |
| 1197 | unsigned short align_buf[1] = { 0 }; |
| 1198 | unsigned char *trailing_buf = buf + buflen - 1; |
| 1199 | |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1200 | if (rw == READ) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1201 | read_atapi_data(base, 1, align_buf); |
| 1202 | memcpy(trailing_buf, align_buf, 1); |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1203 | } else { |
| 1204 | memcpy(align_buf, trailing_buf, 1); |
| 1205 | write_atapi_data(base, 1, align_buf); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1206 | } |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1207 | words++; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1208 | } |
Tejun Heo | 55dba31 | 2007-12-05 16:43:07 +0900 | [diff] [blame] | 1209 | |
| 1210 | return words << 1; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1211 | } |
| 1212 | |
| 1213 | /** |
| 1214 | * bfin_irq_clear - Clear ATAPI interrupt. |
| 1215 | * @ap: Port associated with this ATA transaction. |
| 1216 | * |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1217 | * Note: Original code is ata_bmdma_irq_clear(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1218 | */ |
| 1219 | |
| 1220 | static void bfin_irq_clear(struct ata_port *ap) |
| 1221 | { |
| 1222 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 1223 | |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 1224 | dev_dbg(ap->dev, "in atapi irq clear\n"); |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1225 | ATAPI_SET_INT_STATUS(base, ATAPI_GET_INT_STATUS(base)|ATAPI_DEV_INT |
| 1226 | | MULTI_DONE_INT | UDMAIN_DONE_INT | UDMAOUT_DONE_INT |
| 1227 | | MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1228 | } |
| 1229 | |
| 1230 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1231 | * bfin_thaw - Thaw DMA controller port |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1232 | * @ap: port to thaw |
| 1233 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1234 | * Note: Original code is ata_sff_thaw(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1235 | */ |
| 1236 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1237 | void bfin_thaw(struct ata_port *ap) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1238 | { |
Sonic Zhang | 65c0d4e | 2008-04-25 17:19:25 +0800 | [diff] [blame] | 1239 | dev_dbg(ap->dev, "in atapi dma thaw\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1240 | bfin_check_status(ap); |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1241 | ata_sff_irq_on(ap); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1242 | } |
| 1243 | |
| 1244 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1245 | * bfin_postreset - standard postreset callback |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1246 | * @ap: the target ata_port |
| 1247 | * @classes: classes of attached devices |
| 1248 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1249 | * Note: Original code is ata_sff_postreset(). |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1250 | */ |
| 1251 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1252 | static void bfin_postreset(struct ata_link *link, unsigned int *classes) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1253 | { |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1254 | struct ata_port *ap = link->ap; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1255 | void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr; |
| 1256 | |
| 1257 | /* re-enable interrupts */ |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1258 | ata_sff_irq_on(ap); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1259 | |
| 1260 | /* is double-select really necessary? */ |
| 1261 | if (classes[0] != ATA_DEV_NONE) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1262 | bfin_dev_select(ap, 1); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1263 | if (classes[1] != ATA_DEV_NONE) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1264 | bfin_dev_select(ap, 0); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1265 | |
| 1266 | /* bail out if no device is present */ |
| 1267 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { |
| 1268 | return; |
| 1269 | } |
| 1270 | |
| 1271 | /* set up device control */ |
| 1272 | write_atapi_register(base, ATA_REG_CTRL, ap->ctl); |
| 1273 | } |
| 1274 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1275 | static void bfin_port_stop(struct ata_port *ap) |
| 1276 | { |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 1277 | dev_dbg(ap->dev, "in atapi port stop\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1278 | if (ap->udma_mask != 0 || ap->mwdma_mask != 0) { |
| 1279 | free_dma(CH_ATAPI_RX); |
| 1280 | free_dma(CH_ATAPI_TX); |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | static int bfin_port_start(struct ata_port *ap) |
| 1285 | { |
Sonic Zhang | f920411 | 2008-01-30 16:43:26 +0800 | [diff] [blame] | 1286 | dev_dbg(ap->dev, "in atapi port start\n"); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1287 | if (!(ap->udma_mask || ap->mwdma_mask)) |
| 1288 | return 0; |
| 1289 | |
| 1290 | if (request_dma(CH_ATAPI_RX, "BFIN ATAPI RX DMA") >= 0) { |
| 1291 | if (request_dma(CH_ATAPI_TX, |
| 1292 | "BFIN ATAPI TX DMA") >= 0) |
| 1293 | return 0; |
| 1294 | |
| 1295 | free_dma(CH_ATAPI_RX); |
| 1296 | } |
| 1297 | |
| 1298 | ap->udma_mask = 0; |
| 1299 | ap->mwdma_mask = 0; |
| 1300 | dev_err(ap->dev, "Unable to request ATAPI DMA!" |
| 1301 | " Continue in PIO mode.\n"); |
| 1302 | |
| 1303 | return 0; |
| 1304 | } |
| 1305 | |
Sonic Zhang | 65c0d4e | 2008-04-25 17:19:25 +0800 | [diff] [blame] | 1306 | static unsigned int bfin_ata_host_intr(struct ata_port *ap, |
| 1307 | struct ata_queued_cmd *qc) |
| 1308 | { |
| 1309 | struct ata_eh_info *ehi = &ap->link.eh_info; |
| 1310 | u8 status, host_stat = 0; |
| 1311 | |
| 1312 | VPRINTK("ata%u: protocol %d task_state %d\n", |
| 1313 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
| 1314 | |
| 1315 | /* Check whether we are expecting interrupt in this state */ |
| 1316 | switch (ap->hsm_task_state) { |
| 1317 | case HSM_ST_FIRST: |
| 1318 | /* Some pre-ATAPI-4 devices assert INTRQ |
| 1319 | * at this state when ready to receive CDB. |
| 1320 | */ |
| 1321 | |
| 1322 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
| 1323 | * The flag was turned on only for atapi devices. |
| 1324 | * No need to check is_atapi_taskfile(&qc->tf) again. |
| 1325 | */ |
| 1326 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
| 1327 | goto idle_irq; |
| 1328 | break; |
| 1329 | case HSM_ST_LAST: |
| 1330 | if (qc->tf.protocol == ATA_PROT_DMA || |
| 1331 | qc->tf.protocol == ATAPI_PROT_DMA) { |
| 1332 | /* check status of DMA engine */ |
| 1333 | host_stat = ap->ops->bmdma_status(ap); |
| 1334 | VPRINTK("ata%u: host_stat 0x%X\n", |
| 1335 | ap->print_id, host_stat); |
| 1336 | |
| 1337 | /* if it's not our irq... */ |
| 1338 | if (!(host_stat & ATA_DMA_INTR)) |
| 1339 | goto idle_irq; |
| 1340 | |
| 1341 | /* before we do anything else, clear DMA-Start bit */ |
| 1342 | ap->ops->bmdma_stop(qc); |
| 1343 | |
| 1344 | if (unlikely(host_stat & ATA_DMA_ERR)) { |
| 1345 | /* error when transfering data to/from memory */ |
| 1346 | qc->err_mask |= AC_ERR_HOST_BUS; |
| 1347 | ap->hsm_task_state = HSM_ST_ERR; |
| 1348 | } |
| 1349 | } |
| 1350 | break; |
| 1351 | case HSM_ST: |
| 1352 | break; |
| 1353 | default: |
| 1354 | goto idle_irq; |
| 1355 | } |
| 1356 | |
| 1357 | /* check altstatus */ |
| 1358 | status = ap->ops->sff_check_altstatus(ap); |
| 1359 | if (status & ATA_BUSY) |
| 1360 | goto busy_ata; |
| 1361 | |
| 1362 | /* check main status, clearing INTRQ */ |
| 1363 | status = ap->ops->sff_check_status(ap); |
| 1364 | if (unlikely(status & ATA_BUSY)) |
| 1365 | goto busy_ata; |
| 1366 | |
| 1367 | /* ack bmdma irq events */ |
| 1368 | ap->ops->sff_irq_clear(ap); |
| 1369 | |
| 1370 | ata_sff_hsm_move(ap, qc, status, 0); |
| 1371 | |
| 1372 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || |
| 1373 | qc->tf.protocol == ATAPI_PROT_DMA)) |
| 1374 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
| 1375 | |
| 1376 | busy_ata: |
| 1377 | return 1; /* irq handled */ |
| 1378 | |
| 1379 | idle_irq: |
| 1380 | ap->stats.idle_irq++; |
| 1381 | |
| 1382 | #ifdef ATA_IRQ_TRAP |
| 1383 | if ((ap->stats.idle_irq % 1000) == 0) { |
| 1384 | ap->ops->irq_ack(ap, 0); /* debug trap */ |
| 1385 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
| 1386 | return 1; |
| 1387 | } |
| 1388 | #endif |
| 1389 | return 0; /* irq not handled */ |
| 1390 | } |
| 1391 | |
| 1392 | static irqreturn_t bfin_ata_interrupt(int irq, void *dev_instance) |
| 1393 | { |
| 1394 | struct ata_host *host = dev_instance; |
| 1395 | unsigned int i; |
| 1396 | unsigned int handled = 0; |
| 1397 | unsigned long flags; |
| 1398 | |
| 1399 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
| 1400 | spin_lock_irqsave(&host->lock, flags); |
| 1401 | |
| 1402 | for (i = 0; i < host->n_ports; i++) { |
Tejun Heo | 3e4ec34 | 2010-05-10 21:41:30 +0200 | [diff] [blame] | 1403 | struct ata_port *ap = host->ports[i]; |
| 1404 | struct ata_queued_cmd *qc; |
Sonic Zhang | 65c0d4e | 2008-04-25 17:19:25 +0800 | [diff] [blame] | 1405 | |
Tejun Heo | 3e4ec34 | 2010-05-10 21:41:30 +0200 | [diff] [blame] | 1406 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
| 1407 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) |
| 1408 | handled |= bfin_ata_host_intr(ap, qc); |
Sonic Zhang | 65c0d4e | 2008-04-25 17:19:25 +0800 | [diff] [blame] | 1409 | } |
| 1410 | |
| 1411 | spin_unlock_irqrestore(&host->lock, flags); |
| 1412 | |
| 1413 | return IRQ_RETVAL(handled); |
| 1414 | } |
| 1415 | |
| 1416 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1417 | static struct scsi_host_template bfin_sht = { |
Tejun Heo | 68d1d07 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 1418 | ATA_BASE_SHT(DRV_NAME), |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1419 | .sg_tablesize = SG_NONE, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1420 | .dma_boundary = ATA_DMA_BOUNDARY, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1421 | }; |
| 1422 | |
Sonic Zhang | 65c0d4e | 2008-04-25 17:19:25 +0800 | [diff] [blame] | 1423 | static struct ata_port_operations bfin_pata_ops = { |
Tejun Heo | 8930ff2 | 2010-05-10 21:41:33 +0200 | [diff] [blame] | 1424 | .inherits = &ata_bmdma_port_ops, |
Tejun Heo | 029cfd6 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 1425 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1426 | .set_piomode = bfin_set_piomode, |
| 1427 | .set_dmamode = bfin_set_dmamode, |
| 1428 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1429 | .sff_tf_load = bfin_tf_load, |
| 1430 | .sff_tf_read = bfin_tf_read, |
| 1431 | .sff_exec_command = bfin_exec_command, |
| 1432 | .sff_check_status = bfin_check_status, |
| 1433 | .sff_check_altstatus = bfin_check_altstatus, |
| 1434 | .sff_dev_select = bfin_dev_select, |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 1435 | .sff_set_devctl = bfin_set_devctl, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1436 | |
| 1437 | .bmdma_setup = bfin_bmdma_setup, |
| 1438 | .bmdma_start = bfin_bmdma_start, |
| 1439 | .bmdma_stop = bfin_bmdma_stop, |
| 1440 | .bmdma_status = bfin_bmdma_status, |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1441 | .sff_data_xfer = bfin_data_xfer, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1442 | |
| 1443 | .qc_prep = ata_noop_qc_prep, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1444 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1445 | .thaw = bfin_thaw, |
| 1446 | .softreset = bfin_softreset, |
| 1447 | .postreset = bfin_postreset, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1448 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1449 | .sff_irq_clear = bfin_irq_clear, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1450 | |
| 1451 | .port_start = bfin_port_start, |
| 1452 | .port_stop = bfin_port_stop, |
| 1453 | }; |
| 1454 | |
| 1455 | static struct ata_port_info bfin_port_info[] = { |
| 1456 | { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1457 | .flags = ATA_FLAG_SLAVE_POSS |
| 1458 | | ATA_FLAG_MMIO |
| 1459 | | ATA_FLAG_NO_LEGACY, |
Erik Inge Bolsø | 14bdef9 | 2009-03-14 21:38:24 +0100 | [diff] [blame] | 1460 | .pio_mask = ATA_PIO4, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1461 | .mwdma_mask = 0, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1462 | .udma_mask = 0, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1463 | .port_ops = &bfin_pata_ops, |
| 1464 | }, |
| 1465 | }; |
| 1466 | |
| 1467 | /** |
| 1468 | * bfin_reset_controller - initialize BF54x ATAPI controller. |
| 1469 | */ |
| 1470 | |
| 1471 | static int bfin_reset_controller(struct ata_host *host) |
| 1472 | { |
| 1473 | void __iomem *base = (void __iomem *)host->ports[0]->ioaddr.ctl_addr; |
| 1474 | int count; |
| 1475 | unsigned short status; |
| 1476 | |
| 1477 | /* Disable all ATAPI interrupts */ |
| 1478 | ATAPI_SET_INT_MASK(base, 0); |
| 1479 | SSYNC(); |
| 1480 | |
| 1481 | /* Assert the RESET signal 25us*/ |
| 1482 | ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | DEV_RST); |
| 1483 | udelay(30); |
| 1484 | |
| 1485 | /* Negate the RESET signal for 2ms*/ |
| 1486 | ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) & ~DEV_RST); |
| 1487 | msleep(2); |
| 1488 | |
| 1489 | /* Wait on Busy flag to clear */ |
| 1490 | count = 10000000; |
| 1491 | do { |
| 1492 | status = read_atapi_register(base, ATA_REG_STATUS); |
Roel Kluin | f9d4249 | 2008-04-25 11:37:54 +0800 | [diff] [blame] | 1493 | } while (--count && (status & ATA_BUSY)); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1494 | |
| 1495 | /* Enable only ATAPI Device interrupt */ |
| 1496 | ATAPI_SET_INT_MASK(base, 1); |
| 1497 | SSYNC(); |
| 1498 | |
| 1499 | return (!count); |
| 1500 | } |
| 1501 | |
| 1502 | /** |
| 1503 | * atapi_io_port - define atapi peripheral port pins. |
| 1504 | */ |
| 1505 | static unsigned short atapi_io_port[] = { |
| 1506 | P_ATAPI_RESET, |
| 1507 | P_ATAPI_DIOR, |
| 1508 | P_ATAPI_DIOW, |
| 1509 | P_ATAPI_CS0, |
| 1510 | P_ATAPI_CS1, |
| 1511 | P_ATAPI_DMACK, |
| 1512 | P_ATAPI_DMARQ, |
| 1513 | P_ATAPI_INTRQ, |
| 1514 | P_ATAPI_IORDY, |
Sonic Zhang | 3439d65 | 2009-07-14 13:39:47 -0400 | [diff] [blame] | 1515 | P_ATAPI_D0A, |
| 1516 | P_ATAPI_D1A, |
| 1517 | P_ATAPI_D2A, |
| 1518 | P_ATAPI_D3A, |
| 1519 | P_ATAPI_D4A, |
| 1520 | P_ATAPI_D5A, |
| 1521 | P_ATAPI_D6A, |
| 1522 | P_ATAPI_D7A, |
| 1523 | P_ATAPI_D8A, |
| 1524 | P_ATAPI_D9A, |
| 1525 | P_ATAPI_D10A, |
| 1526 | P_ATAPI_D11A, |
| 1527 | P_ATAPI_D12A, |
| 1528 | P_ATAPI_D13A, |
| 1529 | P_ATAPI_D14A, |
| 1530 | P_ATAPI_D15A, |
| 1531 | P_ATAPI_A0A, |
| 1532 | P_ATAPI_A1A, |
| 1533 | P_ATAPI_A2A, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1534 | 0 |
| 1535 | }; |
| 1536 | |
| 1537 | /** |
| 1538 | * bfin_atapi_probe - attach a bfin atapi interface |
| 1539 | * @pdev: platform device |
| 1540 | * |
| 1541 | * Register a bfin atapi interface. |
| 1542 | * |
| 1543 | * |
| 1544 | * Platform devices are expected to contain 2 resources per port: |
| 1545 | * |
| 1546 | * - I/O Base (IORESOURCE_IO) |
| 1547 | * - IRQ (IORESOURCE_IRQ) |
| 1548 | * |
| 1549 | */ |
| 1550 | static int __devinit bfin_atapi_probe(struct platform_device *pdev) |
| 1551 | { |
| 1552 | int board_idx = 0; |
| 1553 | struct resource *res; |
| 1554 | struct ata_host *host; |
sonic zhang | f88c480 | 2007-11-27 12:47:39 +0800 | [diff] [blame] | 1555 | unsigned int fsclk = get_sclk(); |
| 1556 | int udma_mode = 5; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1557 | const struct ata_port_info *ppi[] = |
| 1558 | { &bfin_port_info[board_idx], NULL }; |
| 1559 | |
| 1560 | /* |
| 1561 | * Simple resource validation .. |
| 1562 | */ |
| 1563 | if (unlikely(pdev->num_resources != 2)) { |
| 1564 | dev_err(&pdev->dev, "invalid number of resources\n"); |
| 1565 | return -EINVAL; |
| 1566 | } |
| 1567 | |
| 1568 | /* |
| 1569 | * Get the register base first |
| 1570 | */ |
| 1571 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1572 | if (res == NULL) |
| 1573 | return -EINVAL; |
| 1574 | |
Andrew Morton | ed722d3 | 2008-01-10 14:33:08 -0800 | [diff] [blame] | 1575 | while (bfin_port_info[board_idx].udma_mask > 0 && |
| 1576 | udma_fsclk[udma_mode] > fsclk) { |
sonic zhang | f88c480 | 2007-11-27 12:47:39 +0800 | [diff] [blame] | 1577 | udma_mode--; |
| 1578 | bfin_port_info[board_idx].udma_mask >>= 1; |
| 1579 | } |
| 1580 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1581 | /* |
| 1582 | * Now that that's out of the way, wire up the port.. |
| 1583 | */ |
| 1584 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1); |
| 1585 | if (!host) |
| 1586 | return -ENOMEM; |
| 1587 | |
| 1588 | host->ports[0]->ioaddr.ctl_addr = (void *)res->start; |
| 1589 | |
| 1590 | if (peripheral_request_list(atapi_io_port, "atapi-io-port")) { |
| 1591 | dev_err(&pdev->dev, "Requesting Peripherals faild\n"); |
| 1592 | return -EFAULT; |
| 1593 | } |
| 1594 | |
| 1595 | if (bfin_reset_controller(host)) { |
| 1596 | peripheral_free_list(atapi_io_port); |
| 1597 | dev_err(&pdev->dev, "Fail to reset ATAPI device\n"); |
| 1598 | return -EFAULT; |
| 1599 | } |
| 1600 | |
| 1601 | if (ata_host_activate(host, platform_get_irq(pdev, 0), |
Sonic Zhang | 65c0d4e | 2008-04-25 17:19:25 +0800 | [diff] [blame] | 1602 | bfin_ata_interrupt, IRQF_SHARED, &bfin_sht) != 0) { |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1603 | peripheral_free_list(atapi_io_port); |
| 1604 | dev_err(&pdev->dev, "Fail to attach ATAPI device\n"); |
| 1605 | return -ENODEV; |
| 1606 | } |
| 1607 | |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1608 | dev_set_drvdata(&pdev->dev, host); |
| 1609 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1610 | return 0; |
| 1611 | } |
| 1612 | |
| 1613 | /** |
| 1614 | * bfin_atapi_remove - unplug a bfin atapi interface |
| 1615 | * @pdev: platform device |
| 1616 | * |
| 1617 | * A bfin atapi device has been unplugged. Perform the needed |
| 1618 | * cleanup. Also called on module unload for any active devices. |
| 1619 | */ |
| 1620 | static int __devexit bfin_atapi_remove(struct platform_device *pdev) |
| 1621 | { |
| 1622 | struct device *dev = &pdev->dev; |
| 1623 | struct ata_host *host = dev_get_drvdata(dev); |
| 1624 | |
| 1625 | ata_host_detach(host); |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1626 | dev_set_drvdata(&pdev->dev, NULL); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1627 | |
| 1628 | peripheral_free_list(atapi_io_port); |
| 1629 | |
| 1630 | return 0; |
| 1631 | } |
| 1632 | |
| 1633 | #ifdef CONFIG_PM |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1634 | static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1635 | { |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1636 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
| 1637 | if (host) |
| 1638 | return ata_host_suspend(host, state); |
| 1639 | else |
| 1640 | return 0; |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1641 | } |
| 1642 | |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1643 | static int bfin_atapi_resume(struct platform_device *pdev) |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1644 | { |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1645 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
| 1646 | int ret; |
| 1647 | |
| 1648 | if (host) { |
| 1649 | ret = bfin_reset_controller(host); |
| 1650 | if (ret) { |
| 1651 | printk(KERN_ERR DRV_NAME ": Error during HW init\n"); |
| 1652 | return ret; |
| 1653 | } |
| 1654 | ata_host_resume(host); |
| 1655 | } |
| 1656 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1657 | return 0; |
| 1658 | } |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1659 | #else |
| 1660 | #define bfin_atapi_suspend NULL |
| 1661 | #define bfin_atapi_resume NULL |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1662 | #endif |
| 1663 | |
| 1664 | static struct platform_driver bfin_atapi_driver = { |
| 1665 | .probe = bfin_atapi_probe, |
| 1666 | .remove = __devexit_p(bfin_atapi_remove), |
Sonic Zhang | 67e3e22 | 2008-09-22 14:47:10 -0700 | [diff] [blame] | 1667 | .suspend = bfin_atapi_suspend, |
| 1668 | .resume = bfin_atapi_resume, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1669 | .driver = { |
| 1670 | .name = DRV_NAME, |
| 1671 | .owner = THIS_MODULE, |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1672 | }, |
| 1673 | }; |
| 1674 | |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1675 | #define ATAPI_MODE_SIZE 10 |
| 1676 | static char bfin_atapi_mode[ATAPI_MODE_SIZE]; |
| 1677 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1678 | static int __init bfin_atapi_init(void) |
| 1679 | { |
| 1680 | pr_info("register bfin atapi driver\n"); |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1681 | |
| 1682 | switch(bfin_atapi_mode[0]) { |
| 1683 | case 'p': |
| 1684 | case 'P': |
| 1685 | break; |
| 1686 | case 'm': |
| 1687 | case 'M': |
| 1688 | bfin_port_info[0].mwdma_mask = ATA_MWDMA2; |
| 1689 | break; |
| 1690 | default: |
| 1691 | bfin_port_info[0].udma_mask = ATA_UDMA5; |
| 1692 | }; |
| 1693 | |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1694 | return platform_driver_register(&bfin_atapi_driver); |
| 1695 | } |
| 1696 | |
| 1697 | static void __exit bfin_atapi_exit(void) |
| 1698 | { |
| 1699 | platform_driver_unregister(&bfin_atapi_driver); |
| 1700 | } |
| 1701 | |
| 1702 | module_init(bfin_atapi_init); |
| 1703 | module_exit(bfin_atapi_exit); |
Sonic Zhang | 858c9c4 | 2007-10-16 16:43:27 +0800 | [diff] [blame] | 1704 | /* |
| 1705 | * ATAPI mode: |
| 1706 | * pio/PIO |
| 1707 | * udma/UDMA (default) |
| 1708 | * mwdma/MWDMA |
| 1709 | */ |
| 1710 | module_param_string(bfin_atapi_mode, bfin_atapi_mode, ATAPI_MODE_SIZE, 0); |
Sonic Zhang | d830d17 | 2007-08-21 13:12:31 +0800 | [diff] [blame] | 1711 | |
| 1712 | MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>"); |
| 1713 | MODULE_DESCRIPTION("PATA driver for blackfin 54x ATAPI controller"); |
| 1714 | MODULE_LICENSE("GPL"); |
| 1715 | MODULE_VERSION(DRV_VERSION); |
Kay Sievers | 458622f | 2008-04-18 13:41:57 -0700 | [diff] [blame] | 1716 | MODULE_ALIAS("platform:" DRV_NAME); |