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669a5db4 JG |
1 | /* |
2 | * pata-cs5535.c - CS5535 PATA for new ATA layer | |
3 | * (C) 2005-2006 Red Hat Inc | |
ab771630 | 4 | * Alan Cox <alan@lxorguk.ukuu.org.uk> |
669a5db4 JG |
5 | * |
6 | * based upon cs5535.c from AMD <Jens.Altmann@amd.com> as cleaned up and | |
d914e5b7 | 7 | * made readable and Linux style by Wolfgang Zuleger <wolfgang.zuleger@gmx.de> |
669a5db4 JG |
8 | * and Alexander Kiausch <alex.kiausch@t-online.de> |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | * | |
23 | * Loosely based on the piix & svwks drivers. | |
24 | * | |
25 | * Documentation: | |
26 | * Available from AMD web site. | |
27 | * TODO | |
3a4fa0a2 | 28 | * Review errata to see if serializing is necessary |
669a5db4 JG |
29 | */ |
30 | ||
31 | #include <linux/kernel.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/blkdev.h> | |
36 | #include <linux/delay.h> | |
37 | #include <scsi/scsi_host.h> | |
38 | #include <linux/libata.h> | |
39 | #include <asm/msr.h> | |
40 | ||
e9f7cd51 | 41 | #define DRV_NAME "pata_cs5535" |
8bc3fc47 | 42 | #define DRV_VERSION "0.2.12" |
669a5db4 JG |
43 | |
44 | /* | |
45 | * The Geode (Aka Athlon GX now) uses an internal MSR based | |
46 | * bus system for control. Demented but there you go. | |
47 | */ | |
48 | ||
49 | #define MSR_ATAC_BASE 0x51300000 | |
50 | #define ATAC_GLD_MSR_CAP (MSR_ATAC_BASE+0) | |
51 | #define ATAC_GLD_MSR_CONFIG (MSR_ATAC_BASE+0x01) | |
52 | #define ATAC_GLD_MSR_SMI (MSR_ATAC_BASE+0x02) | |
53 | #define ATAC_GLD_MSR_ERROR (MSR_ATAC_BASE+0x03) | |
54 | #define ATAC_GLD_MSR_PM (MSR_ATAC_BASE+0x04) | |
55 | #define ATAC_GLD_MSR_DIAG (MSR_ATAC_BASE+0x05) | |
56 | #define ATAC_IO_BAR (MSR_ATAC_BASE+0x08) | |
57 | #define ATAC_RESET (MSR_ATAC_BASE+0x10) | |
58 | #define ATAC_CH0D0_PIO (MSR_ATAC_BASE+0x20) | |
59 | #define ATAC_CH0D0_DMA (MSR_ATAC_BASE+0x21) | |
60 | #define ATAC_CH0D1_PIO (MSR_ATAC_BASE+0x22) | |
61 | #define ATAC_CH0D1_DMA (MSR_ATAC_BASE+0x23) | |
62 | #define ATAC_PCI_ABRTERR (MSR_ATAC_BASE+0x24) | |
63 | ||
64 | #define ATAC_BM0_CMD_PRIM 0x00 | |
65 | #define ATAC_BM0_STS_PRIM 0x02 | |
66 | #define ATAC_BM0_PRD 0x04 | |
67 | ||
68 | #define CS5535_CABLE_DETECT 0x48 | |
69 | ||
669a5db4 | 70 | /** |
eb4a2c7f | 71 | * cs5535_cable_detect - detect cable type |
669a5db4 JG |
72 | * @ap: Port to detect on |
73 | * | |
74 | * Perform cable detection for ATA66 capable cable. Return a libata | |
75 | * cable type. | |
76 | */ | |
77 | ||
eb4a2c7f | 78 | static int cs5535_cable_detect(struct ata_port *ap) |
669a5db4 JG |
79 | { |
80 | u8 cable; | |
81 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
82 | ||
83 | pci_read_config_byte(pdev, CS5535_CABLE_DETECT, &cable); | |
84 | if (cable & 1) | |
eb4a2c7f | 85 | return ATA_CBL_PATA80; |
669a5db4 | 86 | else |
eb4a2c7f | 87 | return ATA_CBL_PATA40; |
669a5db4 JG |
88 | } |
89 | ||
90 | /** | |
91 | * cs5535_set_piomode - PIO setup | |
92 | * @ap: ATA interface | |
93 | * @adev: device on the interface | |
94 | * | |
95 | * Set our PIO requirements. The CS5535 is pretty clean about all this | |
96 | */ | |
97 | ||
98 | static void cs5535_set_piomode(struct ata_port *ap, struct ata_device *adev) | |
99 | { | |
100 | static const u16 pio_timings[5] = { | |
8ebf4738 | 101 | 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 |
669a5db4 JG |
102 | }; |
103 | static const u16 pio_cmd_timings[5] = { | |
104 | 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 | |
105 | }; | |
106 | u32 reg, dummy; | |
107 | struct ata_device *pair = ata_dev_pair(adev); | |
108 | ||
109 | int mode = adev->pio_mode - XFER_PIO_0; | |
110 | int cmdmode = mode; | |
111 | ||
112 | /* Command timing has to be for the lowest of the pair of devices */ | |
113 | if (pair) { | |
114 | int pairmode = pair->pio_mode - XFER_PIO_0; | |
115 | cmdmode = min(mode, pairmode); | |
116 | /* Write the other drive timing register if it changed */ | |
117 | if (cmdmode < pairmode) | |
118 | wrmsr(ATAC_CH0D0_PIO + 2 * pair->devno, | |
119 | pio_cmd_timings[cmdmode] << 16 | pio_timings[pairmode], 0); | |
120 | } | |
121 | /* Write the drive timing register */ | |
122 | wrmsr(ATAC_CH0D0_PIO + 2 * adev->devno, | |
123 | pio_cmd_timings[cmdmode] << 16 | pio_timings[mode], 0); | |
124 | ||
125 | /* Set the PIO "format 1" bit in the DMA timing register */ | |
126 | rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy); | |
127 | wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg | 0x80000000UL, 0); | |
128 | } | |
129 | ||
130 | /** | |
131 | * cs5535_set_dmamode - DMA timing setup | |
132 | * @ap: ATA interface | |
133 | * @adev: Device being configured | |
134 | * | |
135 | */ | |
136 | ||
137 | static void cs5535_set_dmamode(struct ata_port *ap, struct ata_device *adev) | |
138 | { | |
139 | static const u32 udma_timings[5] = { | |
140 | 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 | |
141 | }; | |
142 | static const u32 mwdma_timings[3] = { | |
143 | 0x7F0FFFF3, 0x7F035352, 0x7F024241 | |
144 | }; | |
145 | u32 reg, dummy; | |
146 | int mode = adev->dma_mode; | |
147 | ||
148 | rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy); | |
149 | reg &= 0x80000000UL; | |
150 | if (mode >= XFER_UDMA_0) | |
151 | reg |= udma_timings[mode - XFER_UDMA_0]; | |
152 | else | |
153 | reg |= mwdma_timings[mode - XFER_MW_DMA_0]; | |
154 | wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, 0); | |
155 | } | |
156 | ||
157 | static struct scsi_host_template cs5535_sht = { | |
68d1d07b | 158 | ATA_BMDMA_SHT(DRV_NAME), |
669a5db4 JG |
159 | }; |
160 | ||
161 | static struct ata_port_operations cs5535_port_ops = { | |
029cfd6b TH |
162 | .inherits = &ata_bmdma_port_ops, |
163 | .cable_detect = cs5535_cable_detect, | |
669a5db4 JG |
164 | .set_piomode = cs5535_set_piomode, |
165 | .set_dmamode = cs5535_set_dmamode, | |
669a5db4 JG |
166 | }; |
167 | ||
168 | /** | |
169 | * cs5535_init_one - Initialise a CS5530 | |
170 | * @dev: PCI device | |
171 | * @id: Entry in match table | |
172 | * | |
173 | * Install a driver for the newly found CS5530 companion chip. Most of | |
174 | * this is just housekeeping. We have to set the chip up correctly and | |
175 | * turn off various bits of emulation magic. | |
176 | */ | |
177 | ||
178 | static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
179 | { | |
1626aeb8 | 180 | static const struct ata_port_info info = { |
1d2808fd | 181 | .flags = ATA_FLAG_SLAVE_POSS, |
14bdef98 EIB |
182 | .pio_mask = ATA_PIO4, |
183 | .mwdma_mask = ATA_MWDMA2, | |
bf6263a8 | 184 | .udma_mask = ATA_UDMA4, |
669a5db4 JG |
185 | .port_ops = &cs5535_port_ops |
186 | }; | |
1626aeb8 | 187 | const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; |
669a5db4 | 188 | |
1c5afdf7 | 189 | return ata_pci_bmdma_init_one(dev, ppi, &cs5535_sht, NULL, 0); |
669a5db4 JG |
190 | } |
191 | ||
2d2744fc | 192 | static const struct pci_device_id cs5535[] = { |
02cb009b OS |
193 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), }, |
194 | { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5535_IDE), }, | |
2d2744fc JG |
195 | |
196 | { }, | |
669a5db4 JG |
197 | }; |
198 | ||
199 | static struct pci_driver cs5535_pci_driver = { | |
200 | .name = DRV_NAME, | |
201 | .id_table = cs5535, | |
202 | .probe = cs5535_init_one, | |
3ac551a6 | 203 | .remove = ata_pci_remove_one, |
438ac6d5 | 204 | #ifdef CONFIG_PM |
30ced0f0 A |
205 | .suspend = ata_pci_device_suspend, |
206 | .resume = ata_pci_device_resume, | |
438ac6d5 | 207 | #endif |
669a5db4 JG |
208 | }; |
209 | ||
2fc75da0 | 210 | module_pci_driver(cs5535_pci_driver); |
669a5db4 | 211 | |
669a5db4 | 212 | MODULE_AUTHOR("Alan Cox, Jens Altmann, Wolfgan Zuleger, Alexander Kiausch"); |
e9f7cd51 | 213 | MODULE_DESCRIPTION("low-level driver for the NS/AMD 5535"); |
669a5db4 JG |
214 | MODULE_LICENSE("GPL"); |
215 | MODULE_DEVICE_TABLE(pci, cs5535); | |
216 | MODULE_VERSION(DRV_VERSION); |