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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Broadcom SATA3 AHCI Controller PHY Driver
4 *
5 * Copyright (C) 2016 Broadcom
6 */
7
8#include <linux/delay.h>
9#include <linux/device.h>
10#include <linux/init.h>
11#include <linux/interrupt.h>
12#include <linux/io.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/phy/phy.h>
17#include <linux/platform_device.h>
18
19#define SATA_PCB_BANK_OFFSET 0x23c
20#define SATA_PCB_REG_OFFSET(ofs) ((ofs) * 4)
21
22#define MAX_PORTS 2
23
24/* Register offset between PHYs in PCB space */
25#define SATA_PCB_REG_28NM_SPACE_SIZE 0x1000
26
27/* The older SATA PHY registers duplicated per port registers within the map,
28 * rather than having a separate map per port.
29 */
30#define SATA_PCB_REG_40NM_SPACE_SIZE 0x10
31
32/* Register offset between PHYs in PHY control space */
33#define SATA_PHY_CTRL_REG_28NM_SPACE_SIZE 0x8
34
35enum brcm_sata_phy_version {
36 BRCM_SATA_PHY_STB_16NM,
37 BRCM_SATA_PHY_STB_28NM,
38 BRCM_SATA_PHY_STB_40NM,
39 BRCM_SATA_PHY_IPROC_NS2,
40 BRCM_SATA_PHY_IPROC_NSP,
41 BRCM_SATA_PHY_IPROC_SR,
42 BRCM_SATA_PHY_DSL_28NM,
43};
44
45enum brcm_sata_phy_rxaeq_mode {
46 RXAEQ_MODE_OFF = 0,
47 RXAEQ_MODE_AUTO,
48 RXAEQ_MODE_MANUAL,
49};
50
51static enum brcm_sata_phy_rxaeq_mode rxaeq_to_val(const char *m)
52{
53 if (!strcmp(m, "auto"))
54 return RXAEQ_MODE_AUTO;
55 else if (!strcmp(m, "manual"))
56 return RXAEQ_MODE_MANUAL;
57 else
58 return RXAEQ_MODE_OFF;
59}
60
61struct brcm_sata_port {
62 int portnum;
63 struct phy *phy;
64 struct brcm_sata_phy *phy_priv;
65 bool ssc_en;
66 enum brcm_sata_phy_rxaeq_mode rxaeq_mode;
67 u32 rxaeq_val;
68 u32 tx_amplitude_val;
69};
70
71struct brcm_sata_phy {
72 struct device *dev;
73 void __iomem *phy_base;
74 void __iomem *ctrl_base;
75 enum brcm_sata_phy_version version;
76
77 struct brcm_sata_port phys[MAX_PORTS];
78};
79
80enum sata_phy_regs {
81 BLOCK0_REG_BANK = 0x000,
82 BLOCK0_XGXSSTATUS = 0x81,
83 BLOCK0_XGXSSTATUS_PLL_LOCK = BIT(12),
84 BLOCK0_SPARE = 0x8d,
85 BLOCK0_SPARE_OOB_CLK_SEL_MASK = 0x3,
86 BLOCK0_SPARE_OOB_CLK_SEL_REFBY2 = 0x1,
87
88 BLOCK1_REG_BANK = 0x10,
89 BLOCK1_TEST_TX = 0x83,
90 BLOCK1_TEST_TX_AMP_SHIFT = 12,
91
92 PLL_REG_BANK_0 = 0x050,
93 PLL_REG_BANK_0_PLLCONTROL_0 = 0x81,
94 PLLCONTROL_0_FREQ_DET_RESTART = BIT(13),
95 PLLCONTROL_0_FREQ_MONITOR = BIT(12),
96 PLLCONTROL_0_SEQ_START = BIT(15),
97 PLL_CAP_CHARGE_TIME = 0x83,
98 PLL_VCO_CAL_THRESH = 0x84,
99 PLL_CAP_CONTROL = 0x85,
100 PLL_FREQ_DET_TIME = 0x86,
101 PLL_ACTRL2 = 0x8b,
102 PLL_ACTRL2_SELDIV_MASK = 0x1f,
103 PLL_ACTRL2_SELDIV_SHIFT = 9,
104 PLL_ACTRL6 = 0x86,
105
106 PLL1_REG_BANK = 0x060,
107 PLL1_ACTRL2 = 0x82,
108 PLL1_ACTRL3 = 0x83,
109 PLL1_ACTRL4 = 0x84,
110 PLL1_ACTRL5 = 0x85,
111 PLL1_ACTRL6 = 0x86,
112 PLL1_ACTRL7 = 0x87,
113 PLL1_ACTRL8 = 0x88,
114
115 TX_REG_BANK = 0x070,
116 TX_ACTRL0 = 0x80,
117 TX_ACTRL0_TXPOL_FLIP = BIT(6),
118 TX_ACTRL5 = 0x85,
119 TX_ACTRL5_SSC_EN = BIT(11),
120
121 AEQRX_REG_BANK_0 = 0xd0,
122 AEQ_CONTROL1 = 0x81,
123 AEQ_CONTROL1_ENABLE = BIT(2),
124 AEQ_CONTROL1_FREEZE = BIT(3),
125 AEQ_FRC_EQ = 0x83,
126 AEQ_FRC_EQ_FORCE = BIT(0),
127 AEQ_FRC_EQ_FORCE_VAL = BIT(1),
128 AEQ_RFZ_FRC_VAL = BIT(8),
129 AEQRX_REG_BANK_1 = 0xe0,
130 AEQRX_SLCAL0_CTRL0 = 0x82,
131 AEQRX_SLCAL1_CTRL0 = 0x86,
132
133 OOB_REG_BANK = 0x150,
134 OOB1_REG_BANK = 0x160,
135 OOB_CTRL1 = 0x80,
136 OOB_CTRL1_BURST_MAX_MASK = 0xf,
137 OOB_CTRL1_BURST_MAX_SHIFT = 12,
138 OOB_CTRL1_BURST_MIN_MASK = 0xf,
139 OOB_CTRL1_BURST_MIN_SHIFT = 8,
140 OOB_CTRL1_WAKE_IDLE_MAX_MASK = 0xf,
141 OOB_CTRL1_WAKE_IDLE_MAX_SHIFT = 4,
142 OOB_CTRL1_WAKE_IDLE_MIN_MASK = 0xf,
143 OOB_CTRL1_WAKE_IDLE_MIN_SHIFT = 0,
144 OOB_CTRL2 = 0x81,
145 OOB_CTRL2_SEL_ENA_SHIFT = 15,
146 OOB_CTRL2_SEL_ENA_RC_SHIFT = 14,
147 OOB_CTRL2_RESET_IDLE_MAX_MASK = 0x3f,
148 OOB_CTRL2_RESET_IDLE_MAX_SHIFT = 8,
149 OOB_CTRL2_BURST_CNT_MASK = 0x3,
150 OOB_CTRL2_BURST_CNT_SHIFT = 6,
151 OOB_CTRL2_RESET_IDLE_MIN_MASK = 0x3f,
152 OOB_CTRL2_RESET_IDLE_MIN_SHIFT = 0,
153
154 TXPMD_REG_BANK = 0x1a0,
155 TXPMD_CONTROL1 = 0x81,
156 TXPMD_CONTROL1_TX_SSC_EN_FRC = BIT(0),
157 TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL = BIT(1),
158 TXPMD_TX_FREQ_CTRL_CONTROL1 = 0x82,
159 TXPMD_TX_FREQ_CTRL_CONTROL2 = 0x83,
160 TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK = 0x3ff,
161 TXPMD_TX_FREQ_CTRL_CONTROL3 = 0x84,
162 TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK = 0x3ff,
163
164 RXPMD_REG_BANK = 0x1c0,
165 RXPMD_RX_CDR_CONTROL1 = 0x81,
166 RXPMD_RX_PPM_VAL_MASK = 0x1ff,
167 RXPMD_RXPMD_EN_FRC = BIT(12),
168 RXPMD_RXPMD_EN_FRC_VAL = BIT(13),
169 RXPMD_RX_CDR_CDR_PROP_BW = 0x82,
170 RXPMD_G_CDR_PROP_BW_MASK = 0x7,
171 RXPMD_G1_CDR_PROP_BW_SHIFT = 0,
172 RXPMD_G2_CDR_PROP_BW_SHIFT = 3,
173 RXPMD_G3_CDR_PROB_BW_SHIFT = 6,
174 RXPMD_RX_CDR_CDR_ACQ_INTEG_BW = 0x83,
175 RXPMD_G_CDR_ACQ_INT_BW_MASK = 0x7,
176 RXPMD_G1_CDR_ACQ_INT_BW_SHIFT = 0,
177 RXPMD_G2_CDR_ACQ_INT_BW_SHIFT = 3,
178 RXPMD_G3_CDR_ACQ_INT_BW_SHIFT = 6,
179 RXPMD_RX_CDR_CDR_LOCK_INTEG_BW = 0x84,
180 RXPMD_G_CDR_LOCK_INT_BW_MASK = 0x7,
181 RXPMD_G1_CDR_LOCK_INT_BW_SHIFT = 0,
182 RXPMD_G2_CDR_LOCK_INT_BW_SHIFT = 3,
183 RXPMD_G3_CDR_LOCK_INT_BW_SHIFT = 6,
184 RXPMD_RX_FREQ_MON_CONTROL1 = 0x87,
185 RXPMD_MON_CORRECT_EN = BIT(8),
186 RXPMD_MON_MARGIN_VAL_MASK = 0xff,
187};
188
189enum sata_phy_ctrl_regs {
190 PHY_CTRL_1 = 0x0,
191 PHY_CTRL_1_RESET = BIT(0),
192};
193
194static inline void __iomem *brcm_sata_ctrl_base(struct brcm_sata_port *port)
195{
196 struct brcm_sata_phy *priv = port->phy_priv;
197 u32 size = 0;
198
199 switch (priv->version) {
200 case BRCM_SATA_PHY_IPROC_NS2:
201 size = SATA_PHY_CTRL_REG_28NM_SPACE_SIZE;
202 break;
203 default:
204 dev_err(priv->dev, "invalid phy version\n");
205 break;
206 }
207
208 return priv->ctrl_base + (port->portnum * size);
209}
210
211static void brcm_sata_phy_wr(struct brcm_sata_port *port, u32 bank,
212 u32 ofs, u32 msk, u32 value)
213{
214 struct brcm_sata_phy *priv = port->phy_priv;
215 void __iomem *pcb_base = priv->phy_base;
216 u32 tmp;
217
218 if (priv->version == BRCM_SATA_PHY_STB_40NM)
219 bank += (port->portnum * SATA_PCB_REG_40NM_SPACE_SIZE);
220 else
221 pcb_base += (port->portnum * SATA_PCB_REG_28NM_SPACE_SIZE);
222
223 writel(bank, pcb_base + SATA_PCB_BANK_OFFSET);
224 tmp = readl(pcb_base + SATA_PCB_REG_OFFSET(ofs));
225 tmp = (tmp & msk) | value;
226 writel(tmp, pcb_base + SATA_PCB_REG_OFFSET(ofs));
227}
228
229static u32 brcm_sata_phy_rd(struct brcm_sata_port *port, u32 bank, u32 ofs)
230{
231 struct brcm_sata_phy *priv = port->phy_priv;
232 void __iomem *pcb_base = priv->phy_base;
233
234 if (priv->version == BRCM_SATA_PHY_STB_40NM)
235 bank += (port->portnum * SATA_PCB_REG_40NM_SPACE_SIZE);
236 else
237 pcb_base += (port->portnum * SATA_PCB_REG_28NM_SPACE_SIZE);
238
239 writel(bank, pcb_base + SATA_PCB_BANK_OFFSET);
240 return readl(pcb_base + SATA_PCB_REG_OFFSET(ofs));
241}
242
243/* These defaults were characterized by H/W group */
244#define STB_FMIN_VAL_DEFAULT 0x3df
245#define STB_FMAX_VAL_DEFAULT 0x3df
246#define STB_FMAX_VAL_SSC 0x83
247
248static void brcm_stb_sata_ssc_init(struct brcm_sata_port *port)
249{
250 struct brcm_sata_phy *priv = port->phy_priv;
251 u32 tmp;
252
253 /* override the TX spread spectrum setting */
254 tmp = TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL | TXPMD_CONTROL1_TX_SSC_EN_FRC;
255 brcm_sata_phy_wr(port, TXPMD_REG_BANK, TXPMD_CONTROL1, ~tmp, tmp);
256
257 /* set fixed min freq */
258 brcm_sata_phy_wr(port, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL2,
259 ~TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK,
260 STB_FMIN_VAL_DEFAULT);
261
262 /* set fixed max freq depending on SSC config */
263 if (port->ssc_en) {
264 dev_info(priv->dev, "enabling SSC on port%d\n", port->portnum);
265 tmp = STB_FMAX_VAL_SSC;
266 } else {
267 tmp = STB_FMAX_VAL_DEFAULT;
268 }
269
270 brcm_sata_phy_wr(port, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL3,
271 ~TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK, tmp);
272}
273
274#define AEQ_FRC_EQ_VAL_SHIFT 2
275#define AEQ_FRC_EQ_VAL_MASK 0x3f
276
277static int brcm_stb_sata_rxaeq_init(struct brcm_sata_port *port)
278{
279 u32 tmp = 0, reg = 0;
280
281 switch (port->rxaeq_mode) {
282 case RXAEQ_MODE_OFF:
283 return 0;
284
285 case RXAEQ_MODE_AUTO:
286 reg = AEQ_CONTROL1;
287 tmp = AEQ_CONTROL1_ENABLE | AEQ_CONTROL1_FREEZE;
288 break;
289
290 case RXAEQ_MODE_MANUAL:
291 reg = AEQ_FRC_EQ;
292 tmp = AEQ_FRC_EQ_FORCE | AEQ_FRC_EQ_FORCE_VAL;
293 if (port->rxaeq_val > AEQ_FRC_EQ_VAL_MASK)
294 return -EINVAL;
295 tmp |= port->rxaeq_val << AEQ_FRC_EQ_VAL_SHIFT;
296 break;
297 }
298
299 brcm_sata_phy_wr(port, AEQRX_REG_BANK_0, reg, ~tmp, tmp);
300 brcm_sata_phy_wr(port, AEQRX_REG_BANK_1, reg, ~tmp, tmp);
301
302 return 0;
303}
304
305static int brcm_stb_sata_init(struct brcm_sata_port *port)
306{
307 brcm_stb_sata_ssc_init(port);
308
309 return brcm_stb_sata_rxaeq_init(port);
310}
311
312static int brcm_stb_sata_16nm_ssc_init(struct brcm_sata_port *port)
313{
314 u32 tmp, value;
315
316 /* Reduce CP tail current to 1/16th of its default value */
317 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL6, 0, 0x141);
318
319 /* Turn off CP tail current boost */
320 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL8, 0, 0xc006);
321
322 /* Set a specific AEQ equalizer value */
323 tmp = AEQ_FRC_EQ_FORCE_VAL | AEQ_FRC_EQ_FORCE;
324 brcm_sata_phy_wr(port, AEQRX_REG_BANK_0, AEQ_FRC_EQ,
325 ~(tmp | AEQ_RFZ_FRC_VAL |
326 AEQ_FRC_EQ_VAL_MASK << AEQ_FRC_EQ_VAL_SHIFT),
327 tmp | 32 << AEQ_FRC_EQ_VAL_SHIFT);
328
329 /* Set RX PPM val center frequency */
330 if (port->ssc_en)
331 value = 0x52;
332 else
333 value = 0;
334 brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CONTROL1,
335 ~RXPMD_RX_PPM_VAL_MASK, value);
336
337 /* Set proportional loop bandwith Gen1/2/3 */
338 tmp = RXPMD_G_CDR_PROP_BW_MASK << RXPMD_G1_CDR_PROP_BW_SHIFT |
339 RXPMD_G_CDR_PROP_BW_MASK << RXPMD_G2_CDR_PROP_BW_SHIFT |
340 RXPMD_G_CDR_PROP_BW_MASK << RXPMD_G3_CDR_PROB_BW_SHIFT;
341 if (port->ssc_en)
342 value = 2 << RXPMD_G1_CDR_PROP_BW_SHIFT |
343 2 << RXPMD_G2_CDR_PROP_BW_SHIFT |
344 2 << RXPMD_G3_CDR_PROB_BW_SHIFT;
345 else
346 value = 1 << RXPMD_G1_CDR_PROP_BW_SHIFT |
347 1 << RXPMD_G2_CDR_PROP_BW_SHIFT |
348 1 << RXPMD_G3_CDR_PROB_BW_SHIFT;
349 brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CDR_PROP_BW, ~tmp,
350 value);
351
352 /* Set CDR integral loop acquisition bandwidth for Gen1/2/3 */
353 tmp = RXPMD_G_CDR_ACQ_INT_BW_MASK << RXPMD_G1_CDR_ACQ_INT_BW_SHIFT |
354 RXPMD_G_CDR_ACQ_INT_BW_MASK << RXPMD_G2_CDR_ACQ_INT_BW_SHIFT |
355 RXPMD_G_CDR_ACQ_INT_BW_MASK << RXPMD_G3_CDR_ACQ_INT_BW_SHIFT;
356 if (port->ssc_en)
357 value = 1 << RXPMD_G1_CDR_ACQ_INT_BW_SHIFT |
358 1 << RXPMD_G2_CDR_ACQ_INT_BW_SHIFT |
359 1 << RXPMD_G3_CDR_ACQ_INT_BW_SHIFT;
360 else
361 value = 0;
362 brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CDR_ACQ_INTEG_BW,
363 ~tmp, value);
364
365 /* Set CDR integral loop locking bandwidth to 1 for Gen 1/2/3 */
366 tmp = RXPMD_G_CDR_LOCK_INT_BW_MASK << RXPMD_G1_CDR_LOCK_INT_BW_SHIFT |
367 RXPMD_G_CDR_LOCK_INT_BW_MASK << RXPMD_G2_CDR_LOCK_INT_BW_SHIFT |
368 RXPMD_G_CDR_LOCK_INT_BW_MASK << RXPMD_G3_CDR_LOCK_INT_BW_SHIFT;
369 if (port->ssc_en)
370 value = 1 << RXPMD_G1_CDR_LOCK_INT_BW_SHIFT |
371 1 << RXPMD_G2_CDR_LOCK_INT_BW_SHIFT |
372 1 << RXPMD_G3_CDR_LOCK_INT_BW_SHIFT;
373 else
374 value = 0;
375 brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_CDR_CDR_LOCK_INTEG_BW,
376 ~tmp, value);
377
378 /* Set no guard band and clamp CDR */
379 tmp = RXPMD_MON_CORRECT_EN | RXPMD_MON_MARGIN_VAL_MASK;
380 if (port->ssc_en)
381 value = 0x51;
382 else
383 value = 0;
384 brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_FREQ_MON_CONTROL1,
385 ~tmp, RXPMD_MON_CORRECT_EN | value);
386
387 tmp = GENMASK(15, 12);
388 switch (port->tx_amplitude_val) {
389 case 400:
390 value = BIT(12) | BIT(13);
391 break;
392 case 500:
393 value = BIT(13);
394 break;
395 case 600:
396 value = BIT(12);
397 break;
398 case 800:
399 value = 0;
400 break;
401 default:
402 value = tmp;
403 break;
404 }
405
406 if (value != tmp)
407 brcm_sata_phy_wr(port, BLOCK1_REG_BANK, BLOCK1_TEST_TX, ~tmp,
408 value);
409
410 /* Turn on/off SSC */
411 brcm_sata_phy_wr(port, TX_REG_BANK, TX_ACTRL5, ~TX_ACTRL5_SSC_EN,
412 port->ssc_en ? TX_ACTRL5_SSC_EN : 0);
413
414 return 0;
415}
416
417static int brcm_stb_sata_16nm_init(struct brcm_sata_port *port)
418{
419 return brcm_stb_sata_16nm_ssc_init(port);
420}
421
422/* NS2 SATA PLL1 defaults were characterized by H/W group */
423#define NS2_PLL1_ACTRL2_MAGIC 0x1df8
424#define NS2_PLL1_ACTRL3_MAGIC 0x2b00
425#define NS2_PLL1_ACTRL4_MAGIC 0x8824
426
427static int brcm_ns2_sata_init(struct brcm_sata_port *port)
428{
429 int try;
430 unsigned int val;
431 void __iomem *ctrl_base = brcm_sata_ctrl_base(port);
432 struct device *dev = port->phy_priv->dev;
433
434 /* Configure OOB control */
435 val = 0x0;
436 val |= (0xc << OOB_CTRL1_BURST_MAX_SHIFT);
437 val |= (0x4 << OOB_CTRL1_BURST_MIN_SHIFT);
438 val |= (0x9 << OOB_CTRL1_WAKE_IDLE_MAX_SHIFT);
439 val |= (0x3 << OOB_CTRL1_WAKE_IDLE_MIN_SHIFT);
440 brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL1, 0x0, val);
441 val = 0x0;
442 val |= (0x1b << OOB_CTRL2_RESET_IDLE_MAX_SHIFT);
443 val |= (0x2 << OOB_CTRL2_BURST_CNT_SHIFT);
444 val |= (0x9 << OOB_CTRL2_RESET_IDLE_MIN_SHIFT);
445 brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL2, 0x0, val);
446
447 /* Configure PHY PLL register bank 1 */
448 val = NS2_PLL1_ACTRL2_MAGIC;
449 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL2, 0x0, val);
450 val = NS2_PLL1_ACTRL3_MAGIC;
451 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL3, 0x0, val);
452 val = NS2_PLL1_ACTRL4_MAGIC;
453 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL4, 0x0, val);
454
455 /* Configure PHY BLOCK0 register bank */
456 /* Set oob_clk_sel to refclk/2 */
457 brcm_sata_phy_wr(port, BLOCK0_REG_BANK, BLOCK0_SPARE,
458 ~BLOCK0_SPARE_OOB_CLK_SEL_MASK,
459 BLOCK0_SPARE_OOB_CLK_SEL_REFBY2);
460
461 /* Strobe PHY reset using PHY control register */
462 writel(PHY_CTRL_1_RESET, ctrl_base + PHY_CTRL_1);
463 mdelay(1);
464 writel(0x0, ctrl_base + PHY_CTRL_1);
465 mdelay(1);
466
467 /* Wait for PHY PLL lock by polling pll_lock bit */
468 try = 50;
469 while (try) {
470 val = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
471 BLOCK0_XGXSSTATUS);
472 if (val & BLOCK0_XGXSSTATUS_PLL_LOCK)
473 break;
474 msleep(20);
475 try--;
476 }
477 if (!try) {
478 /* PLL did not lock; give up */
479 dev_err(dev, "port%d PLL did not lock\n", port->portnum);
480 return -ETIMEDOUT;
481 }
482
483 dev_dbg(dev, "port%d initialized\n", port->portnum);
484
485 return 0;
486}
487
488static int brcm_nsp_sata_init(struct brcm_sata_port *port)
489{
490 struct device *dev = port->phy_priv->dev;
491 unsigned int oob_bank;
492 unsigned int val, try;
493
494 /* Configure OOB control */
495 if (port->portnum == 0)
496 oob_bank = OOB_REG_BANK;
497 else if (port->portnum == 1)
498 oob_bank = OOB1_REG_BANK;
499 else
500 return -EINVAL;
501
502 val = 0x0;
503 val |= (0x0f << OOB_CTRL1_BURST_MAX_SHIFT);
504 val |= (0x06 << OOB_CTRL1_BURST_MIN_SHIFT);
505 val |= (0x0f << OOB_CTRL1_WAKE_IDLE_MAX_SHIFT);
506 val |= (0x06 << OOB_CTRL1_WAKE_IDLE_MIN_SHIFT);
507 brcm_sata_phy_wr(port, oob_bank, OOB_CTRL1, 0x0, val);
508
509 val = 0x0;
510 val |= (0x2e << OOB_CTRL2_RESET_IDLE_MAX_SHIFT);
511 val |= (0x02 << OOB_CTRL2_BURST_CNT_SHIFT);
512 val |= (0x16 << OOB_CTRL2_RESET_IDLE_MIN_SHIFT);
513 brcm_sata_phy_wr(port, oob_bank, OOB_CTRL2, 0x0, val);
514
515
516 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_ACTRL2,
517 ~(PLL_ACTRL2_SELDIV_MASK << PLL_ACTRL2_SELDIV_SHIFT),
518 0x0c << PLL_ACTRL2_SELDIV_SHIFT);
519
520 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_CAP_CONTROL,
521 0xff0, 0x4f0);
522
523 val = PLLCONTROL_0_FREQ_DET_RESTART | PLLCONTROL_0_FREQ_MONITOR;
524 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
525 ~val, val);
526 val = PLLCONTROL_0_SEQ_START;
527 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
528 ~val, 0);
529 mdelay(10);
530 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
531 ~val, val);
532
533 /* Wait for pll_seq_done bit */
534 try = 50;
535 while (--try) {
536 val = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
537 BLOCK0_XGXSSTATUS);
538 if (val & BLOCK0_XGXSSTATUS_PLL_LOCK)
539 break;
540 msleep(20);
541 }
542 if (!try) {
543 /* PLL did not lock; give up */
544 dev_err(dev, "port%d PLL did not lock\n", port->portnum);
545 return -ETIMEDOUT;
546 }
547
548 dev_dbg(dev, "port%d initialized\n", port->portnum);
549
550 return 0;
551}
552
553/* SR PHY PLL0 registers */
554#define SR_PLL0_ACTRL6_MAGIC 0xa
555
556/* SR PHY PLL1 registers */
557#define SR_PLL1_ACTRL2_MAGIC 0x32
558#define SR_PLL1_ACTRL3_MAGIC 0x2
559#define SR_PLL1_ACTRL4_MAGIC 0x3e8
560
561static int brcm_sr_sata_init(struct brcm_sata_port *port)
562{
563 struct device *dev = port->phy_priv->dev;
564 unsigned int val, try;
565
566 /* Configure PHY PLL register bank 1 */
567 val = SR_PLL1_ACTRL2_MAGIC;
568 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL2, 0x0, val);
569 val = SR_PLL1_ACTRL3_MAGIC;
570 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL3, 0x0, val);
571 val = SR_PLL1_ACTRL4_MAGIC;
572 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL4, 0x0, val);
573
574 /* Configure PHY PLL register bank 0 */
575 val = SR_PLL0_ACTRL6_MAGIC;
576 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_ACTRL6, 0x0, val);
577
578 /* Wait for PHY PLL lock by polling pll_lock bit */
579 try = 50;
580 do {
581 val = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
582 BLOCK0_XGXSSTATUS);
583 if (val & BLOCK0_XGXSSTATUS_PLL_LOCK)
584 break;
585 msleep(20);
586 try--;
587 } while (try);
588
589 if ((val & BLOCK0_XGXSSTATUS_PLL_LOCK) == 0) {
590 /* PLL did not lock; give up */
591 dev_err(dev, "port%d PLL did not lock\n", port->portnum);
592 return -ETIMEDOUT;
593 }
594
595 /* Invert Tx polarity */
596 brcm_sata_phy_wr(port, TX_REG_BANK, TX_ACTRL0,
597 ~TX_ACTRL0_TXPOL_FLIP, TX_ACTRL0_TXPOL_FLIP);
598
599 /* Configure OOB control to handle 100MHz reference clock */
600 val = ((0xc << OOB_CTRL1_BURST_MAX_SHIFT) |
601 (0x4 << OOB_CTRL1_BURST_MIN_SHIFT) |
602 (0x8 << OOB_CTRL1_WAKE_IDLE_MAX_SHIFT) |
603 (0x3 << OOB_CTRL1_WAKE_IDLE_MIN_SHIFT));
604 brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL1, 0x0, val);
605 val = ((0x1b << OOB_CTRL2_RESET_IDLE_MAX_SHIFT) |
606 (0x2 << OOB_CTRL2_BURST_CNT_SHIFT) |
607 (0x9 << OOB_CTRL2_RESET_IDLE_MIN_SHIFT));
608 brcm_sata_phy_wr(port, OOB_REG_BANK, OOB_CTRL2, 0x0, val);
609
610 return 0;
611}
612
613static int brcm_dsl_sata_init(struct brcm_sata_port *port)
614{
615 struct device *dev = port->phy_priv->dev;
616 unsigned int try;
617 u32 tmp;
618
619 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL7, 0, 0x873);
620
621 brcm_sata_phy_wr(port, PLL1_REG_BANK, PLL1_ACTRL6, 0, 0xc000);
622
623 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
624 0, 0x3089);
625 usleep_range(1000, 2000);
626
627 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_REG_BANK_0_PLLCONTROL_0,
628 0, 0x3088);
629 usleep_range(1000, 2000);
630
631 brcm_sata_phy_wr(port, AEQRX_REG_BANK_1, AEQRX_SLCAL0_CTRL0,
632 0, 0x3000);
633
634 brcm_sata_phy_wr(port, AEQRX_REG_BANK_1, AEQRX_SLCAL1_CTRL0,
635 0, 0x3000);
636 usleep_range(1000, 2000);
637
638 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_CAP_CHARGE_TIME, 0, 0x32);
639
640 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_VCO_CAL_THRESH, 0, 0xa);
641
642 brcm_sata_phy_wr(port, PLL_REG_BANK_0, PLL_FREQ_DET_TIME, 0, 0x64);
643 usleep_range(1000, 2000);
644
645 /* Acquire PLL lock */
646 try = 50;
647 while (try) {
648 tmp = brcm_sata_phy_rd(port, BLOCK0_REG_BANK,
649 BLOCK0_XGXSSTATUS);
650 if (tmp & BLOCK0_XGXSSTATUS_PLL_LOCK)
651 break;
652 msleep(20);
653 try--;
654 }
655
656 if (!try) {
657 /* PLL did not lock; give up */
658 dev_err(dev, "port%d PLL did not lock\n", port->portnum);
659 return -ETIMEDOUT;
660 }
661
662 dev_dbg(dev, "port%d initialized\n", port->portnum);
663
664 return 0;
665}
666
667static int brcm_sata_phy_init(struct phy *phy)
668{
669 int rc;
670 struct brcm_sata_port *port = phy_get_drvdata(phy);
671
672 switch (port->phy_priv->version) {
673 case BRCM_SATA_PHY_STB_16NM:
674 rc = brcm_stb_sata_16nm_init(port);
675 break;
676 case BRCM_SATA_PHY_STB_28NM:
677 case BRCM_SATA_PHY_STB_40NM:
678 rc = brcm_stb_sata_init(port);
679 break;
680 case BRCM_SATA_PHY_IPROC_NS2:
681 rc = brcm_ns2_sata_init(port);
682 break;
683 case BRCM_SATA_PHY_IPROC_NSP:
684 rc = brcm_nsp_sata_init(port);
685 break;
686 case BRCM_SATA_PHY_IPROC_SR:
687 rc = brcm_sr_sata_init(port);
688 break;
689 case BRCM_SATA_PHY_DSL_28NM:
690 rc = brcm_dsl_sata_init(port);
691 break;
692 default:
693 rc = -ENODEV;
694 }
695
696 return rc;
697}
698
699static void brcm_stb_sata_calibrate(struct brcm_sata_port *port)
700{
701 u32 tmp = BIT(8);
702
703 brcm_sata_phy_wr(port, RXPMD_REG_BANK, RXPMD_RX_FREQ_MON_CONTROL1,
704 ~tmp, tmp);
705}
706
707static int brcm_sata_phy_calibrate(struct phy *phy)
708{
709 struct brcm_sata_port *port = phy_get_drvdata(phy);
710 int rc = -EOPNOTSUPP;
711
712 switch (port->phy_priv->version) {
713 case BRCM_SATA_PHY_STB_28NM:
714 case BRCM_SATA_PHY_STB_40NM:
715 brcm_stb_sata_calibrate(port);
716 rc = 0;
717 break;
718 default:
719 break;
720 }
721
722 return rc;
723}
724
725static const struct phy_ops phy_ops = {
726 .init = brcm_sata_phy_init,
727 .calibrate = brcm_sata_phy_calibrate,
728 .owner = THIS_MODULE,
729};
730
731static const struct of_device_id brcm_sata_phy_of_match[] = {
732 { .compatible = "brcm,bcm7216-sata-phy",
733 .data = (void *)BRCM_SATA_PHY_STB_16NM },
734 { .compatible = "brcm,bcm7445-sata-phy",
735 .data = (void *)BRCM_SATA_PHY_STB_28NM },
736 { .compatible = "brcm,bcm7425-sata-phy",
737 .data = (void *)BRCM_SATA_PHY_STB_40NM },
738 { .compatible = "brcm,iproc-ns2-sata-phy",
739 .data = (void *)BRCM_SATA_PHY_IPROC_NS2 },
740 { .compatible = "brcm,iproc-nsp-sata-phy",
741 .data = (void *)BRCM_SATA_PHY_IPROC_NSP },
742 { .compatible = "brcm,iproc-sr-sata-phy",
743 .data = (void *)BRCM_SATA_PHY_IPROC_SR },
744 { .compatible = "brcm,bcm63138-sata-phy",
745 .data = (void *)BRCM_SATA_PHY_DSL_28NM },
746 {},
747};
748MODULE_DEVICE_TABLE(of, brcm_sata_phy_of_match);
749
750static int brcm_sata_phy_probe(struct platform_device *pdev)
751{
752 const char *rxaeq_mode;
753 struct device *dev = &pdev->dev;
754 struct device_node *dn = dev->of_node, *child;
755 const struct of_device_id *of_id;
756 struct brcm_sata_phy *priv;
757 struct phy_provider *provider;
758 int ret, count = 0;
759
760 if (of_get_child_count(dn) == 0)
761 return -ENODEV;
762
763 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
764 if (!priv)
765 return -ENOMEM;
766 dev_set_drvdata(dev, priv);
767 priv->dev = dev;
768
769 priv->phy_base = devm_platform_ioremap_resource_byname(pdev, "phy");
770 if (IS_ERR(priv->phy_base))
771 return PTR_ERR(priv->phy_base);
772
773 of_id = of_match_node(brcm_sata_phy_of_match, dn);
774 if (of_id)
775 priv->version = (uintptr_t)of_id->data;
776 else
777 priv->version = BRCM_SATA_PHY_STB_28NM;
778
779 if (priv->version == BRCM_SATA_PHY_IPROC_NS2) {
780 priv->ctrl_base = devm_platform_ioremap_resource_byname(pdev, "phy-ctrl");
781 if (IS_ERR(priv->ctrl_base))
782 return PTR_ERR(priv->ctrl_base);
783 }
784
785 for_each_available_child_of_node(dn, child) {
786 unsigned int id;
787 struct brcm_sata_port *port;
788
789 if (of_property_read_u32(child, "reg", &id)) {
790 dev_err(dev, "missing reg property in node %pOFn\n",
791 child);
792 ret = -EINVAL;
793 goto put_child;
794 }
795
796 if (id >= MAX_PORTS) {
797 dev_err(dev, "invalid reg: %u\n", id);
798 ret = -EINVAL;
799 goto put_child;
800 }
801 if (priv->phys[id].phy) {
802 dev_err(dev, "already registered port %u\n", id);
803 ret = -EINVAL;
804 goto put_child;
805 }
806
807 port = &priv->phys[id];
808 port->portnum = id;
809 port->phy_priv = priv;
810 port->phy = devm_phy_create(dev, child, &phy_ops);
811 port->rxaeq_mode = RXAEQ_MODE_OFF;
812 if (!of_property_read_string(child, "brcm,rxaeq-mode",
813 &rxaeq_mode))
814 port->rxaeq_mode = rxaeq_to_val(rxaeq_mode);
815 if (port->rxaeq_mode == RXAEQ_MODE_MANUAL)
816 of_property_read_u32(child, "brcm,rxaeq-value",
817 &port->rxaeq_val);
818
819 of_property_read_u32(child, "brcm,tx-amplitude-millivolt",
820 &port->tx_amplitude_val);
821
822 port->ssc_en = of_property_read_bool(child, "brcm,enable-ssc");
823 if (IS_ERR(port->phy)) {
824 dev_err(dev, "failed to create PHY\n");
825 ret = PTR_ERR(port->phy);
826 goto put_child;
827 }
828
829 phy_set_drvdata(port->phy, port);
830 count++;
831 }
832
833 provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
834 if (IS_ERR(provider)) {
835 dev_err(dev, "could not register PHY provider\n");
836 return PTR_ERR(provider);
837 }
838
839 dev_info(dev, "registered %d port(s)\n", count);
840
841 return 0;
842put_child:
843 of_node_put(child);
844 return ret;
845}
846
847static struct platform_driver brcm_sata_phy_driver = {
848 .probe = brcm_sata_phy_probe,
849 .driver = {
850 .of_match_table = brcm_sata_phy_of_match,
851 .name = "brcm-sata-phy",
852 }
853};
854module_platform_driver(brcm_sata_phy_driver);
855
856MODULE_DESCRIPTION("Broadcom SATA PHY driver");
857MODULE_LICENSE("GPL");
858MODULE_AUTHOR("Marc Carino");
859MODULE_AUTHOR("Brian Norris");
860MODULE_ALIAS("platform:phy-brcm-sata");