Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sata_svw.c - ServerWorks / Apple K2 SATA |
| 3 | * |
| 4 | * Maintained by: Benjamin Herrenschmidt <benh@kernel.crashing.org> and |
| 5 | * Jeff Garzik <jgarzik@pobox.com> |
| 6 | * Please ALWAYS copy linux-ide@vger.kernel.org |
| 7 | * on emails. |
| 8 | * |
| 9 | * Copyright 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org> |
| 10 | * |
| 11 | * Bits from Jeff Garzik, Copyright RedHat, Inc. |
| 12 | * |
| 13 | * This driver probably works with non-Apple versions of the |
| 14 | * Broadcom chipset... |
| 15 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * |
Jeff Garzik | af36d7f | 2005-08-28 20:18:39 -0400 | [diff] [blame] | 17 | * This program is free software; you can redistribute it and/or modify |
| 18 | * it under the terms of the GNU General Public License as published by |
| 19 | * the Free Software Foundation; either version 2, or (at your option) |
| 20 | * any later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | * GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; see the file COPYING. If not, write to |
| 29 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 30 | * |
| 31 | * |
| 32 | * libata documentation is available via 'make {ps|pdf}docs', |
| 33 | * as Documentation/DocBook/libata.* |
| 34 | * |
| 35 | * Hardware documentation available under NDA. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | * |
| 37 | */ |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/kernel.h> |
| 40 | #include <linux/module.h> |
| 41 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/blkdev.h> |
| 43 | #include <linux/delay.h> |
| 44 | #include <linux/interrupt.h> |
Jeff Garzik | a9524a7 | 2005-10-30 14:39:11 -0500 | [diff] [blame] | 45 | #include <linux/device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <scsi/scsi_host.h> |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 47 | #include <scsi/scsi_cmnd.h> |
| 48 | #include <scsi/scsi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <linux/libata.h> |
Kevin Hao | d610f50 | 2015-03-12 20:32:42 +0800 | [diff] [blame] | 50 | #include <linux/of.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | #define DRV_NAME "sata_svw" |
Jeff Garzik | 2a3103c | 2007-08-31 04:54:06 -0400 | [diff] [blame] | 53 | #define DRV_VERSION "2.3" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Jeff Garzik | 55cca65 | 2006-03-21 22:14:17 -0500 | [diff] [blame] | 55 | enum { |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 56 | /* ap->flags bits */ |
| 57 | K2_FLAG_SATA_8_PORTS = (1 << 24), |
| 58 | K2_FLAG_NO_ATAPI_DMA = (1 << 25), |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 59 | K2_FLAG_BAR_POS_3 = (1 << 26), |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 60 | |
Jeff Garzik | 55cca65 | 2006-03-21 22:14:17 -0500 | [diff] [blame] | 61 | /* Taskfile registers offsets */ |
| 62 | K2_SATA_TF_CMD_OFFSET = 0x00, |
| 63 | K2_SATA_TF_DATA_OFFSET = 0x00, |
| 64 | K2_SATA_TF_ERROR_OFFSET = 0x04, |
| 65 | K2_SATA_TF_NSECT_OFFSET = 0x08, |
| 66 | K2_SATA_TF_LBAL_OFFSET = 0x0c, |
| 67 | K2_SATA_TF_LBAM_OFFSET = 0x10, |
| 68 | K2_SATA_TF_LBAH_OFFSET = 0x14, |
| 69 | K2_SATA_TF_DEVICE_OFFSET = 0x18, |
| 70 | K2_SATA_TF_CMDSTAT_OFFSET = 0x1c, |
| 71 | K2_SATA_TF_CTL_OFFSET = 0x20, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Jeff Garzik | 55cca65 | 2006-03-21 22:14:17 -0500 | [diff] [blame] | 73 | /* DMA base */ |
| 74 | K2_SATA_DMA_CMD_OFFSET = 0x30, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Jeff Garzik | 55cca65 | 2006-03-21 22:14:17 -0500 | [diff] [blame] | 76 | /* SCRs base */ |
| 77 | K2_SATA_SCR_STATUS_OFFSET = 0x40, |
| 78 | K2_SATA_SCR_ERROR_OFFSET = 0x44, |
| 79 | K2_SATA_SCR_CONTROL_OFFSET = 0x48, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Jeff Garzik | 55cca65 | 2006-03-21 22:14:17 -0500 | [diff] [blame] | 81 | /* Others */ |
| 82 | K2_SATA_SICR1_OFFSET = 0x80, |
| 83 | K2_SATA_SICR2_OFFSET = 0x84, |
| 84 | K2_SATA_SIM_OFFSET = 0x88, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
Jeff Garzik | 55cca65 | 2006-03-21 22:14:17 -0500 | [diff] [blame] | 86 | /* Port stride */ |
| 87 | K2_SATA_PORT_OFFSET = 0x100, |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 88 | |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 89 | chip_svw4 = 0, |
| 90 | chip_svw8 = 1, |
| 91 | chip_svw42 = 2, /* bar 3 */ |
| 92 | chip_svw43 = 3, /* bar 5 */ |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 93 | }; |
| 94 | |
Jeff Garzik | ac19bff | 2005-10-29 13:58:21 -0400 | [diff] [blame] | 95 | static u8 k2_stat_check_status(struct ata_port *ap); |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 98 | static int k2_sata_check_atapi_dma(struct ata_queued_cmd *qc) |
| 99 | { |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 100 | u8 cmnd = qc->scsicmd->cmnd[0]; |
| 101 | |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 102 | if (qc->ap->flags & K2_FLAG_NO_ATAPI_DMA) |
| 103 | return -1; /* ATAPI DMA not supported */ |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 104 | else { |
| 105 | switch (cmnd) { |
| 106 | case READ_10: |
| 107 | case READ_12: |
| 108 | case READ_16: |
| 109 | case WRITE_10: |
| 110 | case WRITE_12: |
| 111 | case WRITE_16: |
| 112 | return 0; |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 113 | |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 114 | default: |
| 115 | return -1; |
| 116 | } |
| 117 | |
| 118 | } |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 119 | } |
| 120 | |
Tejun Heo | 82ef04f | 2008-07-31 17:02:40 +0900 | [diff] [blame] | 121 | static int k2_sata_scr_read(struct ata_link *link, |
| 122 | unsigned int sc_reg, u32 *val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
| 124 | if (sc_reg > SCR_CONTROL) |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 125 | return -EINVAL; |
Tejun Heo | 82ef04f | 2008-07-31 17:02:40 +0900 | [diff] [blame] | 126 | *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4)); |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 127 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | |
Tejun Heo | 82ef04f | 2008-07-31 17:02:40 +0900 | [diff] [blame] | 131 | static int k2_sata_scr_write(struct ata_link *link, |
| 132 | unsigned int sc_reg, u32 val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | { |
| 134 | if (sc_reg > SCR_CONTROL) |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 135 | return -EINVAL; |
Tejun Heo | 82ef04f | 2008-07-31 17:02:40 +0900 | [diff] [blame] | 136 | writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4)); |
Tejun Heo | da3dbb1 | 2007-07-16 14:29:40 +0900 | [diff] [blame] | 137 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
David Milburn | b03e66a | 2012-10-29 18:00:22 -0500 | [diff] [blame] | 140 | static int k2_sata_softreset(struct ata_link *link, |
| 141 | unsigned int *class, unsigned long deadline) |
| 142 | { |
| 143 | u8 dmactl; |
| 144 | void __iomem *mmio = link->ap->ioaddr.bmdma_addr; |
| 145 | |
| 146 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 147 | |
| 148 | /* Clear the start bit */ |
| 149 | if (dmactl & ATA_DMA_START) { |
| 150 | dmactl &= ~ATA_DMA_START; |
| 151 | writeb(dmactl, mmio + ATA_DMA_CMD); |
| 152 | } |
| 153 | |
| 154 | return ata_sff_softreset(link, class, deadline); |
| 155 | } |
| 156 | |
| 157 | static int k2_sata_hardreset(struct ata_link *link, |
| 158 | unsigned int *class, unsigned long deadline) |
| 159 | { |
| 160 | u8 dmactl; |
| 161 | void __iomem *mmio = link->ap->ioaddr.bmdma_addr; |
| 162 | |
| 163 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 164 | |
| 165 | /* Clear the start bit */ |
| 166 | if (dmactl & ATA_DMA_START) { |
| 167 | dmactl &= ~ATA_DMA_START; |
| 168 | writeb(dmactl, mmio + ATA_DMA_CMD); |
| 169 | } |
| 170 | |
| 171 | return sata_sff_hardreset(link, class, deadline); |
| 172 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 174 | static void k2_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | { |
| 176 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 177 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 178 | |
| 179 | if (tf->ctl != ap->last_ctl) { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 180 | writeb(tf->ctl, ioaddr->ctl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | ap->last_ctl = tf->ctl; |
| 182 | ata_wait_idle(ap); |
| 183 | } |
| 184 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
Jeff Garzik | 850a9d8 | 2006-12-20 14:37:04 -0500 | [diff] [blame] | 185 | writew(tf->feature | (((u16)tf->hob_feature) << 8), |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 186 | ioaddr->feature_addr); |
Jeff Garzik | 850a9d8 | 2006-12-20 14:37:04 -0500 | [diff] [blame] | 187 | writew(tf->nsect | (((u16)tf->hob_nsect) << 8), |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 188 | ioaddr->nsect_addr); |
Jeff Garzik | 850a9d8 | 2006-12-20 14:37:04 -0500 | [diff] [blame] | 189 | writew(tf->lbal | (((u16)tf->hob_lbal) << 8), |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 190 | ioaddr->lbal_addr); |
Jeff Garzik | 850a9d8 | 2006-12-20 14:37:04 -0500 | [diff] [blame] | 191 | writew(tf->lbam | (((u16)tf->hob_lbam) << 8), |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 192 | ioaddr->lbam_addr); |
Jeff Garzik | 850a9d8 | 2006-12-20 14:37:04 -0500 | [diff] [blame] | 193 | writew(tf->lbah | (((u16)tf->hob_lbah) << 8), |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 194 | ioaddr->lbah_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } else if (is_addr) { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 196 | writew(tf->feature, ioaddr->feature_addr); |
| 197 | writew(tf->nsect, ioaddr->nsect_addr); |
| 198 | writew(tf->lbal, ioaddr->lbal_addr); |
| 199 | writew(tf->lbam, ioaddr->lbam_addr); |
| 200 | writew(tf->lbah, ioaddr->lbah_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | if (tf->flags & ATA_TFLAG_DEVICE) |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 204 | writeb(tf->device, ioaddr->device_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
| 206 | ata_wait_idle(ap); |
| 207 | } |
| 208 | |
| 209 | |
| 210 | static void k2_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
| 211 | { |
| 212 | struct ata_ioports *ioaddr = &ap->ioaddr; |
Jeff Garzik | ac19bff | 2005-10-29 13:58:21 -0400 | [diff] [blame] | 213 | u16 nsect, lbal, lbam, lbah, feature; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Jeff Garzik | ac19bff | 2005-10-29 13:58:21 -0400 | [diff] [blame] | 215 | tf->command = k2_stat_check_status(ap); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 216 | tf->device = readw(ioaddr->device_addr); |
| 217 | feature = readw(ioaddr->error_addr); |
| 218 | nsect = readw(ioaddr->nsect_addr); |
| 219 | lbal = readw(ioaddr->lbal_addr); |
| 220 | lbam = readw(ioaddr->lbam_addr); |
| 221 | lbah = readw(ioaddr->lbah_addr); |
Jeff Garzik | ac19bff | 2005-10-29 13:58:21 -0400 | [diff] [blame] | 222 | |
| 223 | tf->feature = feature; |
| 224 | tf->nsect = nsect; |
| 225 | tf->lbal = lbal; |
| 226 | tf->lbam = lbam; |
| 227 | tf->lbah = lbah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
| 229 | if (tf->flags & ATA_TFLAG_LBA48) { |
Jeff Garzik | ac19bff | 2005-10-29 13:58:21 -0400 | [diff] [blame] | 230 | tf->hob_feature = feature >> 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | tf->hob_nsect = nsect >> 8; |
| 232 | tf->hob_lbal = lbal >> 8; |
| 233 | tf->hob_lbam = lbam >> 8; |
| 234 | tf->hob_lbah = lbah >> 8; |
Jeff Garzik | 5796d1c | 2007-10-26 00:03:37 -0400 | [diff] [blame] | 235 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | /** |
| 239 | * k2_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction (MMIO) |
| 240 | * @qc: Info associated with this ATA transaction. |
| 241 | * |
| 242 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 243 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | */ |
| 245 | |
Jeff Garzik | 5796d1c | 2007-10-26 00:03:37 -0400 | [diff] [blame] | 246 | static void k2_bmdma_setup_mmio(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
| 248 | struct ata_port *ap = qc->ap; |
| 249 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 250 | u8 dmactl; |
Jeff Garzik | 59f9988 | 2007-05-28 07:07:20 -0400 | [diff] [blame] | 251 | void __iomem *mmio = ap->ioaddr.bmdma_addr; |
| 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* load PRD table addr. */ |
| 254 | mb(); /* make sure PRD table writes are visible to controller */ |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 255 | writel(ap->bmdma_prd_dma, mmio + ATA_DMA_TABLE_OFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
| 257 | /* specify data direction, triple-check start bit is clear */ |
| 258 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 259 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 260 | if (!rw) |
| 261 | dmactl |= ATA_DMA_WR; |
| 262 | writeb(dmactl, mmio + ATA_DMA_CMD); |
| 263 | |
| 264 | /* issue r/w command if this is not a ATA DMA command*/ |
| 265 | if (qc->tf.protocol != ATA_PROT_DMA) |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 266 | ap->ops->sff_exec_command(ap, &qc->tf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | /** |
| 270 | * k2_bmdma_start_mmio - Start a PCI IDE BMDMA transaction (MMIO) |
| 271 | * @qc: Info associated with this ATA transaction. |
| 272 | * |
| 273 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 274 | * spin_lock_irqsave(host lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | */ |
| 276 | |
Jeff Garzik | 5796d1c | 2007-10-26 00:03:37 -0400 | [diff] [blame] | 277 | static void k2_bmdma_start_mmio(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
| 279 | struct ata_port *ap = qc->ap; |
Jeff Garzik | 59f9988 | 2007-05-28 07:07:20 -0400 | [diff] [blame] | 280 | void __iomem *mmio = ap->ioaddr.bmdma_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | u8 dmactl; |
| 282 | |
| 283 | /* start host DMA transaction */ |
| 284 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 285 | writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD); |
Pavel Machek | ec6add9 | 2008-06-23 11:01:31 +0200 | [diff] [blame] | 286 | /* This works around possible data corruption. |
| 287 | |
| 288 | On certain SATA controllers that can be seen when the r/w |
| 289 | command is given to the controller before the host DMA is |
| 290 | started. |
| 291 | |
| 292 | On a Read command, the controller would initiate the |
| 293 | command to the drive even before it sees the DMA |
| 294 | start. When there are very fast drives connected to the |
| 295 | controller, or when the data request hits in the drive |
| 296 | cache, there is the possibility that the drive returns a |
| 297 | part or all of the requested data to the controller before |
| 298 | the DMA start is issued. In this case, the controller |
| 299 | would become confused as to what to do with the data. In |
| 300 | the worst case when all the data is returned back to the |
| 301 | controller, the controller could hang. In other cases it |
| 302 | could return partial data returning in data |
| 303 | corruption. This problem has been seen in PPC systems and |
| 304 | can also appear on an system with very fast disks, where |
| 305 | the SATA controller is sitting behind a number of bridges, |
| 306 | and hence there is significant latency between the r/w |
| 307 | command and the start command. */ |
| 308 | /* issue r/w command if the access is to ATA */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (qc->tf.protocol == ATA_PROT_DMA) |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 310 | ap->ops->sff_exec_command(ap, &qc->tf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
| 312 | |
Jeff Garzik | 8a60a07 | 2005-07-31 13:13:24 -0400 | [diff] [blame] | 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | static u8 k2_stat_check_status(struct ata_port *ap) |
| 315 | { |
Jeff Garzik | 5796d1c | 2007-10-26 00:03:37 -0400 | [diff] [blame] | 316 | return readl(ap->ioaddr.status_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } |
| 318 | |
Al Viro | 3f02567 | 2013-03-31 12:46:43 -0400 | [diff] [blame] | 319 | static int k2_sata_show_info(struct seq_file *m, struct Scsi_Host *shost) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | { |
| 321 | struct ata_port *ap; |
| 322 | struct device_node *np; |
Al Viro | 3f02567 | 2013-03-31 12:46:43 -0400 | [diff] [blame] | 323 | int index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
| 325 | /* Find the ata_port */ |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 326 | ap = ata_shost_to_port(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | if (ap == NULL) |
| 328 | return 0; |
| 329 | |
| 330 | /* Find the OF node for the PCI device proper */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 331 | np = pci_device_to_OF_node(to_pci_dev(ap->host->dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | if (np == NULL) |
| 333 | return 0; |
| 334 | |
| 335 | /* Match it to a port node */ |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 336 | index = (ap == ap->host->ports[0]) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | for (np = np->child; np != NULL; np = np->sibling) { |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 338 | const u32 *reg = of_get_property(np, "reg", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (!reg) |
| 340 | continue; |
Al Viro | 3f02567 | 2013-03-31 12:46:43 -0400 | [diff] [blame] | 341 | if (index == *reg) { |
| 342 | seq_printf(m, "devspec: %s\n", np->full_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | break; |
Al Viro | 3f02567 | 2013-03-31 12:46:43 -0400 | [diff] [blame] | 344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
Al Viro | 3f02567 | 2013-03-31 12:46:43 -0400 | [diff] [blame] | 346 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Jeff Garzik | 193515d | 2005-11-07 00:59:37 -0500 | [diff] [blame] | 349 | static struct scsi_host_template k2_sata_sht = { |
Tejun Heo | 68d1d07 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 350 | ATA_BMDMA_SHT(DRV_NAME), |
Al Viro | 3f02567 | 2013-03-31 12:46:43 -0400 | [diff] [blame] | 351 | .show_info = k2_sata_show_info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | }; |
| 353 | |
| 354 | |
Tejun Heo | 029cfd6 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 355 | static struct ata_port_operations k2_sata_ops = { |
| 356 | .inherits = &ata_bmdma_port_ops, |
David Milburn | b03e66a | 2012-10-29 18:00:22 -0500 | [diff] [blame] | 357 | .softreset = k2_sata_softreset, |
| 358 | .hardreset = k2_sata_hardreset, |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 359 | .sff_tf_load = k2_sata_tf_load, |
| 360 | .sff_tf_read = k2_sata_tf_read, |
| 361 | .sff_check_status = k2_stat_check_status, |
Jeff Garzik | c10340a | 2006-12-14 17:04:33 -0500 | [diff] [blame] | 362 | .check_atapi_dma = k2_sata_check_atapi_dma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | .bmdma_setup = k2_bmdma_setup_mmio, |
| 364 | .bmdma_start = k2_bmdma_start_mmio, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | .scr_read = k2_sata_scr_read, |
| 366 | .scr_write = k2_sata_scr_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | }; |
| 368 | |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 369 | static const struct ata_port_info k2_port_info[] = { |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 370 | /* chip_svw4 */ |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 371 | { |
Sergei Shtylyov | 9cbe056 | 2011-02-04 22:05:48 +0300 | [diff] [blame] | 372 | .flags = ATA_FLAG_SATA | K2_FLAG_NO_ATAPI_DMA, |
Erik Inge Bolsø | 14bdef9 | 2009-03-14 21:38:24 +0100 | [diff] [blame] | 373 | .pio_mask = ATA_PIO4, |
| 374 | .mwdma_mask = ATA_MWDMA2, |
Jeff Garzik | bf6263a | 2007-07-09 12:16:50 -0400 | [diff] [blame] | 375 | .udma_mask = ATA_UDMA6, |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 376 | .port_ops = &k2_sata_ops, |
| 377 | }, |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 378 | /* chip_svw8 */ |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 379 | { |
Sergei Shtylyov | 9cbe056 | 2011-02-04 22:05:48 +0300 | [diff] [blame] | 380 | .flags = ATA_FLAG_SATA | K2_FLAG_NO_ATAPI_DMA | |
| 381 | K2_FLAG_SATA_8_PORTS, |
Erik Inge Bolsø | 14bdef9 | 2009-03-14 21:38:24 +0100 | [diff] [blame] | 382 | .pio_mask = ATA_PIO4, |
| 383 | .mwdma_mask = ATA_MWDMA2, |
Jeff Garzik | bf6263a | 2007-07-09 12:16:50 -0400 | [diff] [blame] | 384 | .udma_mask = ATA_UDMA6, |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 385 | .port_ops = &k2_sata_ops, |
| 386 | }, |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 387 | /* chip_svw42 */ |
| 388 | { |
Sergei Shtylyov | 9cbe056 | 2011-02-04 22:05:48 +0300 | [diff] [blame] | 389 | .flags = ATA_FLAG_SATA | K2_FLAG_BAR_POS_3, |
Erik Inge Bolsø | 14bdef9 | 2009-03-14 21:38:24 +0100 | [diff] [blame] | 390 | .pio_mask = ATA_PIO4, |
| 391 | .mwdma_mask = ATA_MWDMA2, |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 392 | .udma_mask = ATA_UDMA6, |
| 393 | .port_ops = &k2_sata_ops, |
| 394 | }, |
| 395 | /* chip_svw43 */ |
| 396 | { |
Sergei Shtylyov | 9cbe056 | 2011-02-04 22:05:48 +0300 | [diff] [blame] | 397 | .flags = ATA_FLAG_SATA, |
Erik Inge Bolsø | 14bdef9 | 2009-03-14 21:38:24 +0100 | [diff] [blame] | 398 | .pio_mask = ATA_PIO4, |
| 399 | .mwdma_mask = ATA_MWDMA2, |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 400 | .udma_mask = ATA_UDMA6, |
| 401 | .port_ops = &k2_sata_ops, |
| 402 | }, |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 403 | }; |
| 404 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 405 | static void k2_sata_setup_port(struct ata_ioports *port, void __iomem *base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | { |
| 407 | port->cmd_addr = base + K2_SATA_TF_CMD_OFFSET; |
| 408 | port->data_addr = base + K2_SATA_TF_DATA_OFFSET; |
| 409 | port->feature_addr = |
| 410 | port->error_addr = base + K2_SATA_TF_ERROR_OFFSET; |
| 411 | port->nsect_addr = base + K2_SATA_TF_NSECT_OFFSET; |
| 412 | port->lbal_addr = base + K2_SATA_TF_LBAL_OFFSET; |
| 413 | port->lbam_addr = base + K2_SATA_TF_LBAM_OFFSET; |
| 414 | port->lbah_addr = base + K2_SATA_TF_LBAH_OFFSET; |
| 415 | port->device_addr = base + K2_SATA_TF_DEVICE_OFFSET; |
| 416 | port->command_addr = |
| 417 | port->status_addr = base + K2_SATA_TF_CMDSTAT_OFFSET; |
| 418 | port->altstatus_addr = |
| 419 | port->ctl_addr = base + K2_SATA_TF_CTL_OFFSET; |
| 420 | port->bmdma_addr = base + K2_SATA_DMA_CMD_OFFSET; |
| 421 | port->scr_addr = base + K2_SATA_SCR_STATUS_OFFSET; |
| 422 | } |
| 423 | |
| 424 | |
Jeff Garzik | 5796d1c | 2007-10-26 00:03:37 -0400 | [diff] [blame] | 425 | static int k2_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | { |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 427 | const struct ata_port_info *ppi[] = |
| 428 | { &k2_port_info[ent->driver_data], NULL }; |
| 429 | struct ata_host *host; |
Jeff Garzik | ea6ba10 | 2005-08-30 05:18:18 -0400 | [diff] [blame] | 430 | void __iomem *mmio_base; |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 431 | int n_ports, i, rc, bar_pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
Joe Perches | 06296a1 | 2011-04-15 15:52:00 -0700 | [diff] [blame] | 433 | ata_print_version_once(&pdev->dev, DRV_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 435 | /* allocate host */ |
| 436 | n_ports = 4; |
| 437 | if (ppi[0]->flags & K2_FLAG_SATA_8_PORTS) |
| 438 | n_ports = 8; |
| 439 | |
| 440 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports); |
| 441 | if (!host) |
| 442 | return -ENOMEM; |
| 443 | |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 444 | bar_pos = 5; |
| 445 | if (ppi[0]->flags & K2_FLAG_BAR_POS_3) |
| 446 | bar_pos = 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | /* |
| 448 | * If this driver happens to only be useful on Apple's K2, then |
| 449 | * we should check that here as it has a normal Serverworks ID |
| 450 | */ |
Tejun Heo | 24dc5f3 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 451 | rc = pcim_enable_device(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | if (rc) |
| 453 | return rc; |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | /* |
| 456 | * Check if we have resources mapped at all (second function may |
| 457 | * have been disabled by firmware) |
| 458 | */ |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 459 | if (pci_resource_len(pdev, bar_pos) == 0) { |
| 460 | /* In IDE mode we need to pin the device to ensure that |
| 461 | pcim_release does not clear the busmaster bit in config |
| 462 | space, clearing causes busmaster DMA to fail on |
| 463 | ports 3 & 4 */ |
| 464 | pcim_pin_device(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | return -ENODEV; |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 468 | /* Request and iomap PCI regions */ |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 469 | rc = pcim_iomap_regions(pdev, 1 << bar_pos, DRV_NAME); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 470 | if (rc == -EBUSY) |
Tejun Heo | 24dc5f3 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 471 | pcim_pin_device(pdev); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 472 | if (rc) |
Tejun Heo | 24dc5f3 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 473 | return rc; |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 474 | host->iomap = pcim_iomap_table(pdev); |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 475 | mmio_base = host->iomap[bar_pos]; |
Tejun Heo | 4447d35 | 2007-04-17 23:44:08 +0900 | [diff] [blame] | 476 | |
| 477 | /* different controllers have different number of ports - currently 4 or 8 */ |
| 478 | /* All ports are on the same function. Multi-function device is no |
| 479 | * longer available. This should not be seen in any system. */ |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 480 | for (i = 0; i < host->n_ports; i++) { |
| 481 | struct ata_port *ap = host->ports[i]; |
| 482 | unsigned int offset = i * K2_SATA_PORT_OFFSET; |
| 483 | |
| 484 | k2_sata_setup_port(&ap->ioaddr, mmio_base + offset); |
| 485 | |
| 486 | ata_port_pbar_desc(ap, 5, -1, "mmio"); |
| 487 | ata_port_pbar_desc(ap, 5, offset, "port"); |
| 488 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
Quentin Lambert | c54c719 | 2015-04-08 14:34:10 +0200 | [diff] [blame] | 490 | rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | if (rc) |
Tejun Heo | 24dc5f3 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 492 | return rc; |
Quentin Lambert | c54c719 | 2015-04-08 14:34:10 +0200 | [diff] [blame] | 493 | rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | if (rc) |
Tejun Heo | 24dc5f3 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 495 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | /* Clear a magic bit in SCR1 according to Darwin, those help |
| 498 | * some funky seagate drives (though so far, those were already |
Rolf Eike Beer | 104e501 | 2005-03-27 08:50:38 -0500 | [diff] [blame] | 499 | * set by the firmware on the machines I had access to) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | */ |
| 501 | writel(readl(mmio_base + K2_SATA_SICR1_OFFSET) & ~0x00040000, |
| 502 | mmio_base + K2_SATA_SICR1_OFFSET); |
| 503 | |
| 504 | /* Clear SATA error & interrupts we don't use */ |
| 505 | writel(0xffffffff, mmio_base + K2_SATA_SCR_ERROR_OFFSET); |
| 506 | writel(0x0, mmio_base + K2_SATA_SIM_OFFSET); |
| 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | pci_set_master(pdev); |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 509 | return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt, |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 510 | IRQF_SHARED, &k2_sata_sht); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | } |
| 512 | |
Narendra Sankar | 60bf09a | 2005-05-25 16:51:00 -0700 | [diff] [blame] | 513 | /* 0x240 is device ID for Apple K2 device |
| 514 | * 0x241 is device ID for Serverworks Frodo4 |
| 515 | * 0x242 is device ID for Serverworks Frodo8 |
| 516 | * 0x24a is device ID for BCM5785 (aka HT1000) HT southbridge integrated SATA |
| 517 | * controller |
| 518 | * */ |
Jeff Garzik | 3b7d697 | 2005-11-10 11:04:11 -0500 | [diff] [blame] | 519 | static const struct pci_device_id k2_sata_pci_tbl[] = { |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 520 | { PCI_VDEVICE(SERVERWORKS, 0x0240), chip_svw4 }, |
Jeff Garzik | aeb7491 | 2008-04-12 00:11:35 -0400 | [diff] [blame] | 521 | { PCI_VDEVICE(SERVERWORKS, 0x0241), chip_svw8 }, |
| 522 | { PCI_VDEVICE(SERVERWORKS, 0x0242), chip_svw4 }, |
Anantha Subramanyam | 931506d | 2008-02-28 15:58:35 -0800 | [diff] [blame] | 523 | { PCI_VDEVICE(SERVERWORKS, 0x024a), chip_svw4 }, |
| 524 | { PCI_VDEVICE(SERVERWORKS, 0x024b), chip_svw4 }, |
| 525 | { PCI_VDEVICE(SERVERWORKS, 0x0410), chip_svw42 }, |
| 526 | { PCI_VDEVICE(SERVERWORKS, 0x0411), chip_svw43 }, |
Jeff Garzik | 2d2744f | 2006-09-28 20:21:59 -0400 | [diff] [blame] | 527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { } |
| 529 | }; |
| 530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | static struct pci_driver k2_sata_pci_driver = { |
| 532 | .name = DRV_NAME, |
| 533 | .id_table = k2_sata_pci_tbl, |
| 534 | .probe = k2_sata_init_one, |
| 535 | .remove = ata_pci_remove_one, |
| 536 | }; |
| 537 | |
Axel Lin | 2fc75da | 2012-04-19 13:43:05 +0800 | [diff] [blame] | 538 | module_pci_driver(k2_sata_pci_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | MODULE_AUTHOR("Benjamin Herrenschmidt"); |
| 541 | MODULE_DESCRIPTION("low-level driver for K2 SATA controller"); |
| 542 | MODULE_LICENSE("GPL"); |
| 543 | MODULE_DEVICE_TABLE(pci, k2_sata_pci_tbl); |
| 544 | MODULE_VERSION(DRV_VERSION); |