Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/ide/pci/cs5535.c |
| 3 | * |
| 4 | * Copyright (C) 2004-2005 Advanced Micro Devices, Inc. |
| 5 | * |
| 6 | * History: |
| 7 | * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com> |
| 8 | * - Reworked tuneproc, set_drive, misc mods to prep for mainline |
| 9 | * - Work was sponsored by CIS (M) Sdn Bhd. |
| 10 | * Ported to Kernel 2.6.11 on June 26, 2005 by |
| 11 | * Wolfgang Zuleger <wolfgang.zuleger@gmx.de> |
| 12 | * Alexander Kiausch <alex.kiausch@t-online.de> |
| 13 | * Originally developed by AMD for 2.4/2.6 |
| 14 | * |
| 15 | * Development of this chipset driver was funded |
| 16 | * by the nice folks at National Semiconductor/AMD. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify it |
| 19 | * under the terms of the GNU General Public License version 2 as published by |
| 20 | * the Free Software Foundation. |
| 21 | * |
| 22 | * Documentation: |
| 23 | * CS5535 documentation available from AMD |
| 24 | */ |
| 25 | |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 26 | #include <linux/module.h> |
| 27 | #include <linux/pci.h> |
| 28 | #include <linux/ide.h> |
| 29 | |
| 30 | #include "ide-timing.h" |
| 31 | |
| 32 | #define MSR_ATAC_BASE 0x51300000 |
| 33 | #define ATAC_GLD_MSR_CAP (MSR_ATAC_BASE+0) |
| 34 | #define ATAC_GLD_MSR_CONFIG (MSR_ATAC_BASE+0x01) |
| 35 | #define ATAC_GLD_MSR_SMI (MSR_ATAC_BASE+0x02) |
| 36 | #define ATAC_GLD_MSR_ERROR (MSR_ATAC_BASE+0x03) |
| 37 | #define ATAC_GLD_MSR_PM (MSR_ATAC_BASE+0x04) |
| 38 | #define ATAC_GLD_MSR_DIAG (MSR_ATAC_BASE+0x05) |
| 39 | #define ATAC_IO_BAR (MSR_ATAC_BASE+0x08) |
| 40 | #define ATAC_RESET (MSR_ATAC_BASE+0x10) |
| 41 | #define ATAC_CH0D0_PIO (MSR_ATAC_BASE+0x20) |
| 42 | #define ATAC_CH0D0_DMA (MSR_ATAC_BASE+0x21) |
| 43 | #define ATAC_CH0D1_PIO (MSR_ATAC_BASE+0x22) |
| 44 | #define ATAC_CH0D1_DMA (MSR_ATAC_BASE+0x23) |
| 45 | #define ATAC_PCI_ABRTERR (MSR_ATAC_BASE+0x24) |
| 46 | #define ATAC_BM0_CMD_PRIM 0x00 |
| 47 | #define ATAC_BM0_STS_PRIM 0x02 |
| 48 | #define ATAC_BM0_PRD 0x04 |
| 49 | #define CS5535_CABLE_DETECT 0x48 |
| 50 | |
| 51 | /* Format I PIO settings. We seperate out cmd and data for safer timings */ |
| 52 | |
| 53 | static unsigned int cs5535_pio_cmd_timings[5] = |
| 54 | { 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 }; |
| 55 | static unsigned int cs5535_pio_dta_timings[5] = |
| 56 | { 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 }; |
| 57 | |
| 58 | static unsigned int cs5535_mwdma_timings[3] = |
| 59 | { 0x7F0FFFF3, 0x7F035352, 0x7f024241 }; |
| 60 | |
| 61 | static unsigned int cs5535_udma_timings[5] = |
| 62 | { 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 }; |
| 63 | |
| 64 | /* Macros to check if the register is the reset value - reset value is an |
| 65 | invalid timing and indicates the register has not been set previously */ |
| 66 | |
| 67 | #define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 ) |
| 68 | #define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 ) |
| 69 | |
| 70 | /**** |
| 71 | * cs5535_set_speed - Configure the chipset to the new speed |
| 72 | * @drive: Drive to set up |
| 73 | * @speed: desired speed |
| 74 | * |
| 75 | * cs5535_set_speed() configures the chipset to a new speed. |
| 76 | */ |
| 77 | static void cs5535_set_speed(ide_drive_t *drive, u8 speed) |
| 78 | { |
| 79 | |
| 80 | u32 reg = 0, dummy; |
| 81 | int unit = drive->select.b.unit; |
| 82 | |
| 83 | |
| 84 | /* Set the PIO timings */ |
| 85 | if ((speed & XFER_MODE) == XFER_PIO) { |
| 86 | u8 pioa; |
| 87 | u8 piob; |
| 88 | u8 cmd; |
| 89 | |
| 90 | pioa = speed - XFER_PIO_0; |
| 91 | piob = ide_get_best_pio_mode(&(drive->hwif->drives[!unit]), |
| 92 | 255, 4, NULL); |
| 93 | cmd = pioa < piob ? pioa : piob; |
| 94 | |
| 95 | /* Write the speed of the current drive */ |
| 96 | reg = (cs5535_pio_cmd_timings[cmd] << 16) | |
| 97 | cs5535_pio_dta_timings[pioa]; |
| 98 | wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0); |
| 99 | |
| 100 | /* And if nessesary - change the speed of the other drive */ |
| 101 | rdmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy); |
| 102 | |
| 103 | if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) != |
| 104 | cs5535_pio_cmd_timings[cmd]) { |
| 105 | reg &= 0x0000FFFF; |
| 106 | reg |= cs5535_pio_cmd_timings[cmd] << 16; |
| 107 | wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0); |
| 108 | } |
| 109 | |
| 110 | /* Set bit 31 of the DMA register for PIO format 1 timings */ |
| 111 | rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy); |
| 112 | wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, |
| 113 | reg | 0x80000000UL, 0); |
| 114 | } else { |
| 115 | rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy); |
| 116 | |
| 117 | reg &= 0x80000000UL; /* Preserve the PIO format bit */ |
| 118 | |
| 119 | if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_7) |
| 120 | reg |= cs5535_udma_timings[speed - XFER_UDMA_0]; |
| 121 | else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) |
| 122 | reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0]; |
| 123 | else |
| 124 | return; |
| 125 | |
| 126 | wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0); |
| 127 | } |
| 128 | } |
| 129 | |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 130 | /**** |
| 131 | * cs5535_set_drive - Configure the drive to the new speed |
| 132 | * @drive: Drive to set up |
| 133 | * @speed: desired speed |
| 134 | * |
| 135 | * cs5535_set_drive() configures the drive and the chipset to a |
| 136 | * new speed. It also can be called by upper layers. |
| 137 | */ |
| 138 | static int cs5535_set_drive(ide_drive_t *drive, u8 speed) |
| 139 | { |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 140 | speed = ide_rate_filter(drive, speed); |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 141 | ide_config_drive_speed(drive, speed); |
| 142 | cs5535_set_speed(drive, speed); |
| 143 | |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | /**** |
| 148 | * cs5535_tuneproc - PIO setup |
| 149 | * @drive: drive to set up |
| 150 | * @pio: mode to use (255 for 'best possible') |
| 151 | * |
| 152 | * A callback from the upper layers for PIO-only tuning. |
| 153 | */ |
| 154 | static void cs5535_tuneproc(ide_drive_t *drive, u8 xferspeed) |
| 155 | { |
| 156 | u8 modes[] = { XFER_PIO_0, XFER_PIO_1, XFER_PIO_2, XFER_PIO_3, |
| 157 | XFER_PIO_4 }; |
| 158 | |
| 159 | /* cs5535 max pio is pio 4, best_pio will check the blacklist. |
| 160 | i think we don't need to rate_filter the incoming xferspeed |
| 161 | since we know we're only going to choose pio */ |
| 162 | xferspeed = ide_get_best_pio_mode(drive, xferspeed, 4, NULL); |
| 163 | ide_config_drive_speed(drive, modes[xferspeed]); |
| 164 | cs5535_set_speed(drive, xferspeed); |
| 165 | } |
| 166 | |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 167 | static int cs5535_dma_check(ide_drive_t *drive) |
| 168 | { |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 169 | u8 speed; |
| 170 | |
| 171 | drive->init_speed = 0; |
| 172 | |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 173 | if (ide_tune_dma(drive)) |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 174 | return 0; |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 175 | |
Bartlomiej Zolnierkiewicz | 7569e8d | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 176 | if (ide_use_fast_pio(drive)) { |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 177 | speed = ide_get_best_pio_mode(drive, 255, 4, NULL); |
| 178 | cs5535_set_drive(drive, speed); |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 179 | } |
Bartlomiej Zolnierkiewicz | d8f4469 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 180 | |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 181 | return -1; |
Jaya Kumar | f5b2d8b | 2005-11-09 23:58:16 +0100 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | static u8 __devinit cs5535_cable_detect(struct pci_dev *dev) |
| 185 | { |
| 186 | u8 bit; |
| 187 | |
| 188 | /* if a 80 wire cable was detected */ |
| 189 | pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit); |
| 190 | return (bit & 1); |
| 191 | } |
| 192 | |
| 193 | /**** |
| 194 | * init_hwif_cs5535 - Initialize one ide cannel |
| 195 | * @hwif: Channel descriptor |
| 196 | * |
| 197 | * This gets invoked by the IDE driver once for each channel. It |
| 198 | * performs channel-specific pre-initialization before drive probing. |
| 199 | * |
| 200 | */ |
| 201 | static void __devinit init_hwif_cs5535(ide_hwif_t *hwif) |
| 202 | { |
| 203 | int i; |
| 204 | |
| 205 | hwif->autodma = 0; |
| 206 | |
| 207 | hwif->tuneproc = &cs5535_tuneproc; |
| 208 | hwif->speedproc = &cs5535_set_drive; |
| 209 | hwif->ide_dma_check = &cs5535_dma_check; |
| 210 | |
| 211 | hwif->atapi_dma = 1; |
| 212 | hwif->ultra_mask = 0x1F; |
| 213 | hwif->mwdma_mask = 0x07; |
| 214 | |
| 215 | |
| 216 | hwif->udma_four = cs5535_cable_detect(hwif->pci_dev); |
| 217 | |
| 218 | if (!noautodma) |
| 219 | hwif->autodma = 1; |
| 220 | |
| 221 | /* just setting autotune and not worrying about bios timings */ |
| 222 | for (i = 0; i < 2; i++) { |
| 223 | hwif->drives[i].autotune = 1; |
| 224 | hwif->drives[i].autodma = hwif->autodma; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | static ide_pci_device_t cs5535_chipset __devinitdata = { |
| 229 | .name = "CS5535", |
| 230 | .init_hwif = init_hwif_cs5535, |
| 231 | .channels = 1, |
| 232 | .autodma = AUTODMA, |
| 233 | .bootable = ON_BOARD, |
| 234 | }; |
| 235 | |
| 236 | static int __devinit cs5535_init_one(struct pci_dev *dev, |
| 237 | const struct pci_device_id *id) |
| 238 | { |
| 239 | return ide_setup_pci_device(dev, &cs5535_chipset); |
| 240 | } |
| 241 | |
| 242 | static struct pci_device_id cs5535_pci_tbl[] = |
| 243 | { |
| 244 | { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_IDE, PCI_ANY_ID, |
| 245 | PCI_ANY_ID, 0, 0, 0}, |
| 246 | { 0, }, |
| 247 | }; |
| 248 | |
| 249 | MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl); |
| 250 | |
| 251 | static struct pci_driver driver = { |
| 252 | .name = "CS5535_IDE", |
| 253 | .id_table = cs5535_pci_tbl, |
| 254 | .probe = cs5535_init_one, |
| 255 | }; |
| 256 | |
| 257 | static int __init cs5535_ide_init(void) |
| 258 | { |
| 259 | return ide_pci_register_driver(&driver); |
| 260 | } |
| 261 | |
| 262 | module_init(cs5535_ide_init); |
| 263 | |
| 264 | MODULE_AUTHOR("AMD"); |
| 265 | MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE"); |
| 266 | MODULE_LICENSE("GPL"); |