2 * Faraday Technology FTIDE010 driver
3 * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
5 * Includes portions of the SL2312/SL3516/Gemini PATA driver
6 * Copyright (C) 2003 StorLine, Inc <jason@storlink.com.tw>
7 * Copyright (C) 2009 Janos Laube <janos.dev@gmail.com>
8 * Copyright (C) 2010 Frederic Pecourt <opengemini@free.fr>
9 * Copyright (C) 2011 Tobias Waldvogel <tobias.waldvogel@gmail.com>
12 #include <linux/platform_device.h>
13 #include <linux/module.h>
14 #include <linux/libata.h>
15 #include <linux/bitops.h>
16 #include <linux/of_address.h>
17 #include <linux/of_device.h>
18 #include <linux/clk.h>
19 #include "sata_gemini.h"
21 #define DRV_NAME "pata_ftide010"
24 * struct ftide010 - state container for the Faraday FTIDE010
25 * @dev: pointer back to the device representing this controller
26 * @base: remapped I/O space address
27 * @pclk: peripheral clock for the IDE block
28 * @host: pointer to the ATA host for this device
29 * @master_cbl: master cable type
30 * @slave_cbl: slave cable type
31 * @sg: Gemini SATA bridge pointer, if running on the Gemini
32 * @master_to_sata0: Gemini SATA bridge: the ATA master is connected
34 * @slave_to_sata0: Gemini SATA bridge: the ATA slave is connected
36 * @master_to_sata1: Gemini SATA bridge: the ATA master is connected
38 * @slave_to_sata1: Gemini SATA bridge: the ATA slave is connected
45 struct ata_host
*host
;
46 unsigned int master_cbl
;
47 unsigned int slave_cbl
;
48 /* Gemini-specific properties */
49 struct sata_gemini
*sg
;
56 #define FTIDE010_DMA_REG 0x00
57 #define FTIDE010_DMA_STATUS 0x02
58 #define FTIDE010_IDE_BMDTPR 0x04
59 #define FTIDE010_IDE_DEVICE_ID 0x08
60 #define FTIDE010_PIO_TIMING 0x10
61 #define FTIDE010_MWDMA_TIMING 0x11
62 #define FTIDE010_UDMA_TIMING0 0x12 /* Master */
63 #define FTIDE010_UDMA_TIMING1 0x13 /* Slave */
64 #define FTIDE010_CLK_MOD 0x14
65 /* These registers are mapped directly to the IDE registers */
66 #define FTIDE010_CMD_DATA 0x20
67 #define FTIDE010_ERROR_FEATURES 0x21
68 #define FTIDE010_NSECT 0x22
69 #define FTIDE010_LBAL 0x23
70 #define FTIDE010_LBAM 0x24
71 #define FTIDE010_LBAH 0x25
72 #define FTIDE010_DEVICE 0x26
73 #define FTIDE010_STATUS_COMMAND 0x27
74 #define FTIDE010_ALTSTAT_CTRL 0x36
76 /* Set this bit for UDMA mode 5 and 6 */
77 #define FTIDE010_UDMA_TIMING_MODE_56 BIT(7)
79 /* 0 = 50 MHz, 1 = 66 MHz */
80 #define FTIDE010_CLK_MOD_DEV0_CLK_SEL BIT(0)
81 #define FTIDE010_CLK_MOD_DEV1_CLK_SEL BIT(1)
82 /* Enable UDMA on a device */
83 #define FTIDE010_CLK_MOD_DEV0_UDMA_EN BIT(4)
84 #define FTIDE010_CLK_MOD_DEV1_UDMA_EN BIT(5)
86 static struct scsi_host_template pata_ftide010_sht
= {
87 ATA_BMDMA_SHT(DRV_NAME
),
93 * The unit of the below required timings is two clock periods of the ATA
94 * reference clock which is 30 nanoseconds per unit at 66MHz and 20
95 * nanoseconds per unit at 50 MHz. The PIO timings assume 33MHz speed for
98 * pio_active_time: array of 5 elements for T2 timing for Mode 0,
99 * 1, 2, 3 and 4. Range 0..15.
100 * pio_recovery_time: array of 5 elements for T2l timing for Mode 0,
101 * 1, 2, 3 and 4. Range 0..15.
102 * mdma_50_active_time: array of 4 elements for Td timing for multi
103 * word DMA, Mode 0, 1, and 2 at 50 MHz. Range 0..15.
104 * mdma_50_recovery_time: array of 4 elements for Tk timing for
105 * multi word DMA, Mode 0, 1 and 2 at 50 MHz. Range 0..15.
106 * mdma_66_active_time: array of 4 elements for Td timing for multi
107 * word DMA, Mode 0, 1 and 2 at 66 MHz. Range 0..15.
108 * mdma_66_recovery_time: array of 4 elements for Tk timing for
109 * multi word DMA, Mode 0, 1 and 2 at 66 MHz. Range 0..15.
110 * udma_50_setup_time: array of 4 elements for Tvds timing for ultra
111 * DMA, Mode 0, 1, 2, 3, 4 and 5 at 50 MHz. Range 0..7.
112 * udma_50_hold_time: array of 4 elements for Tdvh timing for
113 * multi word DMA, Mode 0, 1, 2, 3, 4 and 5 at 50 MHz, Range 0..7.
114 * udma_66_setup_time: array of 4 elements for Tvds timing for multi
115 * word DMA, Mode 0, 1, 2, 3, 4, 5 and 6 at 66 MHz. Range 0..7.
116 * udma_66_hold_time: array of 4 elements for Tdvh timing for
117 * multi word DMA, Mode 0, 1, 2, 3, 4, 5 and 6 at 66 MHz. Range 0..7.
119 static const u8 pio_active_time
[5] = {10, 10, 10, 3, 3};
120 static const u8 pio_recovery_time
[5] = {10, 3, 1, 3, 1};
121 static const u8 mwdma_50_active_time
[3] = {6, 2, 2};
122 static const u8 mwdma_50_recovery_time
[3] = {6, 2, 1};
123 static const u8 mwdma_66_active_time
[3] = {8, 3, 3};
124 static const u8 mwdma_66_recovery_time
[3] = {8, 2, 1};
125 static const u8 udma_50_setup_time
[6] = {3, 3, 2, 2, 1, 1};
126 static const u8 udma_50_hold_time
[6] = {3, 1, 1, 1, 1, 1};
127 static const u8 udma_66_setup_time
[7] = {4, 4, 3, 2, };
128 static const u8 udma_66_hold_time
[7] = {};
131 * We set 66 MHz for all MWDMA modes
133 static const bool set_mdma_66_mhz
[] = { true, true, true, true };
136 * We set 66 MHz for UDMA modes 3, 4 and 6 and no others
138 static const bool set_udma_66_mhz
[] = { false, false, false, true, true, false, true };
140 static void ftide010_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
142 struct ftide010
*ftide
= ap
->host
->private_data
;
143 u8 speed
= adev
->dma_mode
;
144 u8 devno
= adev
->devno
& 1;
151 /* Target device 0 (master) or 1 (slave) */
153 udma_en_mask
= FTIDE010_CLK_MOD_DEV0_UDMA_EN
;
154 f66m_en_mask
= FTIDE010_CLK_MOD_DEV0_CLK_SEL
;
156 udma_en_mask
= FTIDE010_CLK_MOD_DEV1_UDMA_EN
;
157 f66m_en_mask
= FTIDE010_CLK_MOD_DEV1_CLK_SEL
;
160 clkreg
= readb(ftide
->base
+ FTIDE010_CLK_MOD
);
161 clkreg
&= ~udma_en_mask
;
162 clkreg
&= ~f66m_en_mask
;
164 if (speed
& XFER_UDMA_0
) {
165 i
= speed
& ~XFER_UDMA_0
;
166 dev_dbg(ftide
->dev
, "set UDMA mode %02x, index %d\n",
169 clkreg
|= udma_en_mask
;
170 if (set_udma_66_mhz
[i
]) {
171 clkreg
|= f66m_en_mask
;
172 timreg
= udma_66_setup_time
[i
] << 4 |
173 udma_66_hold_time
[i
];
175 timreg
= udma_50_setup_time
[i
] << 4 |
176 udma_50_hold_time
[i
];
179 /* A special bit needs to be set for modes 5 and 6 */
181 timreg
|= FTIDE010_UDMA_TIMING_MODE_56
;
183 dev_dbg(ftide
->dev
, "UDMA write clkreg = %02x, timreg = %02x\n",
186 writeb(clkreg
, ftide
->base
+ FTIDE010_CLK_MOD
);
187 writeb(timreg
, ftide
->base
+ FTIDE010_UDMA_TIMING0
+ devno
);
189 i
= speed
& ~XFER_MW_DMA_0
;
190 dev_dbg(ftide
->dev
, "set MWDMA mode %02x, index %d\n",
193 if (set_mdma_66_mhz
[i
]) {
194 clkreg
|= f66m_en_mask
;
195 timreg
= mwdma_66_active_time
[i
] << 4 |
196 mwdma_66_recovery_time
[i
];
198 timreg
= mwdma_50_active_time
[i
] << 4 |
199 mwdma_50_recovery_time
[i
];
202 "MWDMA write clkreg = %02x, timreg = %02x\n",
204 /* This will affect all devices */
205 writeb(clkreg
, ftide
->base
+ FTIDE010_CLK_MOD
);
206 writeb(timreg
, ftide
->base
+ FTIDE010_MWDMA_TIMING
);
210 * Store the current device (master or slave) in ap->private_data
211 * so that .qc_issue() can detect if this changes and reprogram
214 ap
->private_data
= adev
;
219 static void ftide010_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
221 struct ftide010
*ftide
= ap
->host
->private_data
;
222 u8 pio
= adev
->pio_mode
- XFER_PIO_0
;
224 dev_dbg(ftide
->dev
, "set PIO mode %02x, index %d\n",
225 adev
->pio_mode
, pio
);
226 writeb(pio_active_time
[pio
] << 4 | pio_recovery_time
[pio
],
227 ftide
->base
+ FTIDE010_PIO_TIMING
);
231 * We implement our own qc_issue() callback since we may need to set up
232 * the timings differently for master and slave transfers: the CLK_MOD_REG
233 * and MWDMA_TIMING_REG is shared between master and slave, so reprogramming
234 * this may be necessary.
236 static unsigned int ftide010_qc_issue(struct ata_queued_cmd
*qc
)
238 struct ata_port
*ap
= qc
->ap
;
239 struct ata_device
*adev
= qc
->dev
;
242 * If the device changed, i.e. slave->master, master->slave,
243 * then set up the DMA mode again so we are sure the timings
246 if (adev
!= ap
->private_data
&& ata_dma_enabled(adev
))
247 ftide010_set_dmamode(ap
, adev
);
249 return ata_bmdma_qc_issue(qc
);
252 static struct ata_port_operations pata_ftide010_port_ops
= {
253 .inherits
= &ata_bmdma_port_ops
,
254 .set_dmamode
= ftide010_set_dmamode
,
255 .set_piomode
= ftide010_set_piomode
,
256 .qc_issue
= ftide010_qc_issue
,
259 static struct ata_port_info ftide010_port_info
[] = {
261 .flags
= ATA_FLAG_SLAVE_POSS
,
262 .mwdma_mask
= ATA_MWDMA2
,
263 .udma_mask
= ATA_UDMA6
,
264 .pio_mask
= ATA_PIO4
,
265 .port_ops
= &pata_ftide010_port_ops
,
269 #if IS_ENABLED(CONFIG_SATA_GEMINI)
271 static int pata_ftide010_gemini_port_start(struct ata_port
*ap
)
273 struct ftide010
*ftide
= ap
->host
->private_data
;
274 struct device
*dev
= ftide
->dev
;
275 struct sata_gemini
*sg
= ftide
->sg
;
279 ret
= ata_bmdma_port_start(ap
);
283 if (ftide
->master_to_sata0
) {
284 dev_info(dev
, "SATA0 (master) start\n");
285 ret
= gemini_sata_start_bridge(sg
, 0);
289 if (ftide
->master_to_sata1
) {
290 dev_info(dev
, "SATA1 (master) start\n");
291 ret
= gemini_sata_start_bridge(sg
, 1);
295 /* Avoid double-starting */
296 if (ftide
->slave_to_sata0
&& !ftide
->master_to_sata0
) {
297 dev_info(dev
, "SATA0 (slave) start\n");
298 ret
= gemini_sata_start_bridge(sg
, 0);
302 /* Avoid double-starting */
303 if (ftide
->slave_to_sata1
&& !ftide
->master_to_sata1
) {
304 dev_info(dev
, "SATA1 (slave) start\n");
305 ret
= gemini_sata_start_bridge(sg
, 1);
310 dev_info(dev
, "brought %d bridges online\n", bridges
);
311 return (bridges
> 0) ? 0 : -EINVAL
; // -ENODEV;
314 static void pata_ftide010_gemini_port_stop(struct ata_port
*ap
)
316 struct ftide010
*ftide
= ap
->host
->private_data
;
317 struct device
*dev
= ftide
->dev
;
318 struct sata_gemini
*sg
= ftide
->sg
;
320 if (ftide
->master_to_sata0
) {
321 dev_info(dev
, "SATA0 (master) stop\n");
322 gemini_sata_stop_bridge(sg
, 0);
324 if (ftide
->master_to_sata1
) {
325 dev_info(dev
, "SATA1 (master) stop\n");
326 gemini_sata_stop_bridge(sg
, 1);
328 /* Avoid double-stopping */
329 if (ftide
->slave_to_sata0
&& !ftide
->master_to_sata0
) {
330 dev_info(dev
, "SATA0 (slave) stop\n");
331 gemini_sata_stop_bridge(sg
, 0);
333 /* Avoid double-stopping */
334 if (ftide
->slave_to_sata1
&& !ftide
->master_to_sata1
) {
335 dev_info(dev
, "SATA1 (slave) stop\n");
336 gemini_sata_stop_bridge(sg
, 1);
340 static int pata_ftide010_gemini_cable_detect(struct ata_port
*ap
)
342 struct ftide010
*ftide
= ap
->host
->private_data
;
345 * Return the master cable, I have no clue how to return a different
346 * cable for the slave than for the master.
348 return ftide
->master_cbl
;
351 static int pata_ftide010_gemini_init(struct ftide010
*ftide
,
354 struct device
*dev
= ftide
->dev
;
355 struct sata_gemini
*sg
;
356 enum gemini_muxmode muxmode
;
358 /* Look up SATA bridge */
359 sg
= gemini_sata_bridge_get();
364 muxmode
= gemini_sata_get_muxmode(sg
);
367 pata_ftide010_port_ops
.port_start
=
368 pata_ftide010_gemini_port_start
;
369 pata_ftide010_port_ops
.port_stop
=
370 pata_ftide010_gemini_port_stop
;
371 pata_ftide010_port_ops
.cable_detect
=
372 pata_ftide010_gemini_cable_detect
;
374 /* Flag port as SATA-capable */
375 if (gemini_sata_bridge_enabled(sg
, is_ata1
))
376 ftide010_port_info
[0].flags
|= ATA_FLAG_SATA
;
379 * We assume that a simple 40-wire cable is used in the PATA mode.
380 * if you're adding a system using the PATA interface, make sure
381 * the right cable is set up here, it might be necessary to use
382 * special hardware detection or encode the cable type in the device
383 * tree with special properties.
387 case GEMINI_MUXMODE_0
:
388 ftide
->master_cbl
= ATA_CBL_SATA
;
389 ftide
->slave_cbl
= ATA_CBL_PATA40
;
390 ftide
->master_to_sata0
= true;
392 case GEMINI_MUXMODE_1
:
393 ftide
->master_cbl
= ATA_CBL_SATA
;
394 ftide
->slave_cbl
= ATA_CBL_NONE
;
395 ftide
->master_to_sata0
= true;
397 case GEMINI_MUXMODE_2
:
398 ftide
->master_cbl
= ATA_CBL_PATA40
;
399 ftide
->slave_cbl
= ATA_CBL_PATA40
;
401 case GEMINI_MUXMODE_3
:
402 ftide
->master_cbl
= ATA_CBL_SATA
;
403 ftide
->slave_cbl
= ATA_CBL_SATA
;
404 ftide
->master_to_sata0
= true;
405 ftide
->slave_to_sata1
= true;
410 case GEMINI_MUXMODE_0
:
411 ftide
->master_cbl
= ATA_CBL_SATA
;
412 ftide
->slave_cbl
= ATA_CBL_NONE
;
413 ftide
->master_to_sata1
= true;
415 case GEMINI_MUXMODE_1
:
416 ftide
->master_cbl
= ATA_CBL_SATA
;
417 ftide
->slave_cbl
= ATA_CBL_PATA40
;
418 ftide
->master_to_sata1
= true;
420 case GEMINI_MUXMODE_2
:
421 ftide
->master_cbl
= ATA_CBL_SATA
;
422 ftide
->slave_cbl
= ATA_CBL_SATA
;
423 ftide
->slave_to_sata0
= true;
424 ftide
->master_to_sata1
= true;
426 case GEMINI_MUXMODE_3
:
427 ftide
->master_cbl
= ATA_CBL_PATA40
;
428 ftide
->slave_cbl
= ATA_CBL_PATA40
;
432 dev_info(dev
, "set up Gemini PATA%d\n", is_ata1
);
437 static int pata_ftide010_gemini_init(struct ftide010
*ftide
,
445 static int pata_ftide010_probe(struct platform_device
*pdev
)
447 struct device
*dev
= &pdev
->dev
;
448 struct device_node
*np
= dev
->of_node
;
449 const struct ata_port_info pi
= ftide010_port_info
[0];
450 const struct ata_port_info
*ppi
[] = { &pi
, NULL
};
451 struct ftide010
*ftide
;
452 struct resource
*res
;
457 ftide
= devm_kzalloc(dev
, sizeof(*ftide
), GFP_KERNEL
);
462 irq
= platform_get_irq(pdev
, 0);
466 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
470 ftide
->base
= devm_ioremap_resource(dev
, res
);
471 if (IS_ERR(ftide
->base
))
472 return PTR_ERR(ftide
->base
);
474 ftide
->pclk
= devm_clk_get(dev
, "PCLK");
475 if (!IS_ERR(ftide
->pclk
)) {
476 ret
= clk_prepare_enable(ftide
->pclk
);
478 dev_err(dev
, "failed to enable PCLK\n");
483 /* Some special Cortina Gemini init, if needed */
484 if (of_device_is_compatible(np
, "cortina,gemini-pata")) {
486 * We need to know which instance is probing (the
487 * Gemini has two instances of FTIDE010) and we do
488 * this simply by looking at the physical base
489 * address, which is 0x63400000 for ATA1, else we
490 * are ATA0. This will also set up the cable types.
492 ret
= pata_ftide010_gemini_init(ftide
,
493 (res
->start
== 0x63400000));
497 /* Else assume we are connected using PATA40 */
498 ftide
->master_cbl
= ATA_CBL_PATA40
;
499 ftide
->slave_cbl
= ATA_CBL_PATA40
;
502 ftide
->host
= ata_host_alloc_pinfo(dev
, ppi
, 1);
507 ftide
->host
->private_data
= ftide
;
509 for (i
= 0; i
< ftide
->host
->n_ports
; i
++) {
510 struct ata_port
*ap
= ftide
->host
->ports
[i
];
511 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
513 ioaddr
->bmdma_addr
= ftide
->base
+ FTIDE010_DMA_REG
;
514 ioaddr
->cmd_addr
= ftide
->base
+ FTIDE010_CMD_DATA
;
515 ioaddr
->ctl_addr
= ftide
->base
+ FTIDE010_ALTSTAT_CTRL
;
516 ioaddr
->altstatus_addr
= ftide
->base
+ FTIDE010_ALTSTAT_CTRL
;
517 ata_sff_std_ports(ioaddr
);
520 dev_info(dev
, "device ID %08x, irq %d, reg %pR\n",
521 readl(ftide
->base
+ FTIDE010_IDE_DEVICE_ID
), irq
, res
);
523 ret
= ata_host_activate(ftide
->host
, irq
, ata_bmdma_interrupt
,
524 0, &pata_ftide010_sht
);
531 if (!IS_ERR(ftide
->pclk
))
532 clk_disable_unprepare(ftide
->pclk
);
536 static int pata_ftide010_remove(struct platform_device
*pdev
)
538 struct ata_host
*host
= platform_get_drvdata(pdev
);
539 struct ftide010
*ftide
= host
->private_data
;
541 ata_host_detach(ftide
->host
);
542 if (!IS_ERR(ftide
->pclk
))
543 clk_disable_unprepare(ftide
->pclk
);
548 static const struct of_device_id pata_ftide010_of_match
[] = {
550 .compatible
= "faraday,ftide010",
555 static struct platform_driver pata_ftide010_driver
= {
558 .of_match_table
= of_match_ptr(pata_ftide010_of_match
),
560 .probe
= pata_ftide010_probe
,
561 .remove
= pata_ftide010_remove
,
563 module_platform_driver(pata_ftide010_driver
);
565 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
566 MODULE_LICENSE("GPL");
567 MODULE_ALIAS("platform:" DRV_NAME
);