2 * pata-cs5535.c - CS5535 PATA for new ATA layer
3 * (C) 2005-2006 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
6 * based upon cs5535.c from AMD <Jens.Altmann@amd.com> as cleaned up and
7 * made readable and Linux style by Wolfgang Zuleger <wolfgang.zuleger@gmx.de
8 * and Alexander Kiausch <alex.kiausch@t-online.de>
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.
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.
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
23 * Loosely based on the piix & svwks drivers.
26 * Available from AMD web site.
28 * Review errata to see if serializing is neccessary
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>
41 #define DRV_NAME "cs5535"
42 #define DRV_VERSION "0.2.12"
45 * The Geode (Aka Athlon GX now) uses an internal MSR based
46 * bus system for control. Demented but there you go.
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)
64 #define ATAC_BM0_CMD_PRIM 0x00
65 #define ATAC_BM0_STS_PRIM 0x02
66 #define ATAC_BM0_PRD 0x04
68 #define CS5535_CABLE_DETECT 0x48
70 #define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL)==0x00009172 )
73 * cs5535_cable_detect - detect cable type
74 * @ap: Port to detect on
75 * @deadline: deadline jiffies for the operation
77 * Perform cable detection for ATA66 capable cable. Return a libata
81 static int cs5535_cable_detect(struct ata_port *ap)
84 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
86 pci_read_config_byte(pdev, CS5535_CABLE_DETECT, &cable);
88 return ATA_CBL_PATA80;
90 return ATA_CBL_PATA40;
94 * cs5535_set_piomode - PIO setup
96 * @adev: device on the interface
98 * Set our PIO requirements. The CS5535 is pretty clean about all this
101 static void cs5535_set_piomode(struct ata_port *ap, struct ata_device *adev)
103 static const u16 pio_timings[5] = {
104 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131
106 static const u16 pio_cmd_timings[5] = {
107 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131
110 struct ata_device *pair = ata_dev_pair(adev);
112 int mode = adev->pio_mode - XFER_PIO_0;
115 /* Command timing has to be for the lowest of the pair of devices */
117 int pairmode = pair->pio_mode - XFER_PIO_0;
118 cmdmode = min(mode, pairmode);
119 /* Write the other drive timing register if it changed */
120 if (cmdmode < pairmode)
121 wrmsr(ATAC_CH0D0_PIO + 2 * pair->devno,
122 pio_cmd_timings[cmdmode] << 16 | pio_timings[pairmode], 0);
124 /* Write the drive timing register */
125 wrmsr(ATAC_CH0D0_PIO + 2 * adev->devno,
126 pio_cmd_timings[cmdmode] << 16 | pio_timings[mode], 0);
128 /* Set the PIO "format 1" bit in the DMA timing register */
129 rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy);
130 wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg | 0x80000000UL, 0);
134 * cs5535_set_dmamode - DMA timing setup
136 * @adev: Device being configured
140 static void cs5535_set_dmamode(struct ata_port *ap, struct ata_device *adev)
142 static const u32 udma_timings[5] = {
143 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061
145 static const u32 mwdma_timings[3] = {
146 0x7F0FFFF3, 0x7F035352, 0x7F024241
149 int mode = adev->dma_mode;
151 rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy);
153 if (mode >= XFER_UDMA_0)
154 reg |= udma_timings[mode - XFER_UDMA_0];
156 reg |= mwdma_timings[mode - XFER_MW_DMA_0];
157 wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, 0);
160 static struct scsi_host_template cs5535_sht = {
161 .module = THIS_MODULE,
163 .ioctl = ata_scsi_ioctl,
164 .queuecommand = ata_scsi_queuecmd,
165 .can_queue = ATA_DEF_QUEUE,
166 .this_id = ATA_SHT_THIS_ID,
167 .sg_tablesize = LIBATA_MAX_PRD,
168 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
169 .emulated = ATA_SHT_EMULATED,
170 .use_clustering = ATA_SHT_USE_CLUSTERING,
171 .proc_name = DRV_NAME,
172 .dma_boundary = ATA_DMA_BOUNDARY,
173 .slave_configure = ata_scsi_slave_config,
174 .slave_destroy = ata_scsi_slave_destroy,
175 .bios_param = ata_std_bios_param,
178 static struct ata_port_operations cs5535_port_ops = {
179 .set_piomode = cs5535_set_piomode,
180 .set_dmamode = cs5535_set_dmamode,
181 .mode_filter = ata_pci_default_filter,
183 .tf_load = ata_tf_load,
184 .tf_read = ata_tf_read,
185 .check_status = ata_check_status,
186 .exec_command = ata_exec_command,
187 .dev_select = ata_std_dev_select,
189 .freeze = ata_bmdma_freeze,
190 .thaw = ata_bmdma_thaw,
191 .error_handler = ata_bmdma_error_handler,
192 .post_internal_cmd = ata_bmdma_post_internal_cmd,
193 .cable_detect = cs5535_cable_detect,
195 .bmdma_setup = ata_bmdma_setup,
196 .bmdma_start = ata_bmdma_start,
197 .bmdma_stop = ata_bmdma_stop,
198 .bmdma_status = ata_bmdma_status,
200 .qc_prep = ata_qc_prep,
201 .qc_issue = ata_qc_issue_prot,
203 .data_xfer = ata_data_xfer,
205 .irq_handler = ata_interrupt,
206 .irq_clear = ata_bmdma_irq_clear,
207 .irq_on = ata_irq_on,
209 .port_start = ata_sff_port_start,
213 * cs5535_init_one - Initialise a CS5530
215 * @id: Entry in match table
217 * Install a driver for the newly found CS5530 companion chip. Most of
218 * this is just housekeeping. We have to set the chip up correctly and
219 * turn off various bits of emulation magic.
222 static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
224 static const struct ata_port_info info = {
226 .flags = ATA_FLAG_SLAVE_POSS,
229 .udma_mask = ATA_UDMA4,
230 .port_ops = &cs5535_port_ops
232 const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
236 /* Check the BIOS set the initial timing clock. If not set the
238 rdmsr(ATAC_CH0D0_PIO, timings, dummy);
239 if (CS5535_BAD_PIO(timings))
240 wrmsr(ATAC_CH0D0_PIO, 0xF7F4F7F4UL, 0);
241 rdmsr(ATAC_CH0D1_PIO, timings, dummy);
242 if (CS5535_BAD_PIO(timings))
243 wrmsr(ATAC_CH0D1_PIO, 0xF7F4F7F4UL, 0);
244 return ata_pci_init_one(dev, ppi);
247 static const struct pci_device_id cs5535[] = {
248 { PCI_VDEVICE(NS, 0x002D), },
253 static struct pci_driver cs5535_pci_driver = {
256 .probe = cs5535_init_one,
257 .remove = ata_pci_remove_one,
259 .suspend = ata_pci_device_suspend,
260 .resume = ata_pci_device_resume,
264 static int __init cs5535_init(void)
266 return pci_register_driver(&cs5535_pci_driver);
269 static void __exit cs5535_exit(void)
271 pci_unregister_driver(&cs5535_pci_driver);
274 MODULE_AUTHOR("Alan Cox, Jens Altmann, Wolfgan Zuleger, Alexander Kiausch");
275 MODULE_DESCRIPTION("low-level driver for the NS/AMD 5530");
276 MODULE_LICENSE("GPL");
277 MODULE_DEVICE_TABLE(pci, cs5535);
278 MODULE_VERSION(DRV_VERSION);
280 module_init(cs5535_init);
281 module_exit(cs5535_exit);