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19#include <linux/device.h>
20#include <linux/platform_device.h>
21#include <linux/phy.h>
22#include <linux/regmap.h>
23#include <linux/clk.h>
24#include <linux/reset.h>
25#include <linux/of_net.h>
26#include <linux/mfd/syscon.h>
27#include <linux/stmmac.h>
28#include <linux/of_mdio.h>
29#include <linux/module.h>
30
31#include "stmmac_platform.h"
32
33#define NSS_COMMON_CLK_GATE 0x8
34#define NSS_COMMON_CLK_GATE_PTP_EN(x) BIT(0x10 + x)
35#define NSS_COMMON_CLK_GATE_RGMII_RX_EN(x) BIT(0x9 + (x * 2))
36#define NSS_COMMON_CLK_GATE_RGMII_TX_EN(x) BIT(0x8 + (x * 2))
37#define NSS_COMMON_CLK_GATE_GMII_RX_EN(x) BIT(0x4 + x)
38#define NSS_COMMON_CLK_GATE_GMII_TX_EN(x) BIT(0x0 + x)
39
40#define NSS_COMMON_CLK_DIV0 0xC
41#define NSS_COMMON_CLK_DIV_OFFSET(x) (x * 8)
42#define NSS_COMMON_CLK_DIV_MASK 0x7f
43
44#define NSS_COMMON_CLK_SRC_CTRL 0x14
45#define NSS_COMMON_CLK_SRC_CTRL_OFFSET(x) (x)
46
47
48
49
50
51#define NSS_COMMON_CLK_SRC_CTRL_RGMII(x) 1
52#define NSS_COMMON_CLK_SRC_CTRL_SGMII(x) ((x >= 2) ? 1 : 0)
53
54#define NSS_COMMON_MACSEC_CTL 0x28
55#define NSS_COMMON_MACSEC_CTL_EXT_BYPASS_EN(x) (1 << x)
56
57#define NSS_COMMON_GMAC_CTL(x) (0x30 + (x * 4))
58#define NSS_COMMON_GMAC_CTL_CSYS_REQ BIT(19)
59#define NSS_COMMON_GMAC_CTL_PHY_IFACE_SEL BIT(16)
60#define NSS_COMMON_GMAC_CTL_IFG_LIMIT_OFFSET 8
61#define NSS_COMMON_GMAC_CTL_IFG_OFFSET 0
62#define NSS_COMMON_GMAC_CTL_IFG_MASK 0x3f
63
64#define NSS_COMMON_CLK_DIV_RGMII_1000 1
65#define NSS_COMMON_CLK_DIV_RGMII_100 9
66#define NSS_COMMON_CLK_DIV_RGMII_10 99
67#define NSS_COMMON_CLK_DIV_SGMII_1000 0
68#define NSS_COMMON_CLK_DIV_SGMII_100 4
69#define NSS_COMMON_CLK_DIV_SGMII_10 49
70
71#define QSGMII_PCS_MODE_CTL 0x68
72#define QSGMII_PCS_MODE_CTL_AUTONEG_EN(x) BIT((x * 8) + 7)
73
74#define QSGMII_PCS_CAL_LCKDT_CTL 0x120
75#define QSGMII_PCS_CAL_LCKDT_CTL_RST BIT(19)
76
77
78#define QSGMII_PHY_SGMII_CTL(x) ((x == 1) ? 0x134 : \
79 (0x13c + (4 * (x - 2))))
80#define QSGMII_PHY_CDR_EN BIT(0)
81#define QSGMII_PHY_RX_FRONT_EN BIT(1)
82#define QSGMII_PHY_RX_SIGNAL_DETECT_EN BIT(2)
83#define QSGMII_PHY_TX_DRIVER_EN BIT(3)
84#define QSGMII_PHY_QSGMII_EN BIT(7)
85#define QSGMII_PHY_PHASE_LOOP_GAIN_OFFSET 12
86#define QSGMII_PHY_PHASE_LOOP_GAIN_MASK 0x7
87#define QSGMII_PHY_RX_DC_BIAS_OFFSET 18
88#define QSGMII_PHY_RX_DC_BIAS_MASK 0x3
89#define QSGMII_PHY_RX_INPUT_EQU_OFFSET 20
90#define QSGMII_PHY_RX_INPUT_EQU_MASK 0x3
91#define QSGMII_PHY_CDR_PI_SLEW_OFFSET 22
92#define QSGMII_PHY_CDR_PI_SLEW_MASK 0x3
93#define QSGMII_PHY_TX_DRV_AMP_OFFSET 28
94#define QSGMII_PHY_TX_DRV_AMP_MASK 0xf
95
96struct ipq806x_gmac {
97 struct platform_device *pdev;
98 struct regmap *nss_common;
99 struct regmap *qsgmii_csr;
100 uint32_t id;
101 struct clk *core_clk;
102 phy_interface_t phy_mode;
103};
104
105static int get_clk_div_sgmii(struct ipq806x_gmac *gmac, unsigned int speed)
106{
107 struct device *dev = &gmac->pdev->dev;
108 int div;
109
110 switch (speed) {
111 case SPEED_1000:
112 div = NSS_COMMON_CLK_DIV_SGMII_1000;
113 break;
114
115 case SPEED_100:
116 div = NSS_COMMON_CLK_DIV_SGMII_100;
117 break;
118
119 case SPEED_10:
120 div = NSS_COMMON_CLK_DIV_SGMII_10;
121 break;
122
123 default:
124 dev_err(dev, "Speed %dMbps not supported in SGMII\n", speed);
125 return -EINVAL;
126 }
127
128 return div;
129}
130
131static int get_clk_div_rgmii(struct ipq806x_gmac *gmac, unsigned int speed)
132{
133 struct device *dev = &gmac->pdev->dev;
134 int div;
135
136 switch (speed) {
137 case SPEED_1000:
138 div = NSS_COMMON_CLK_DIV_RGMII_1000;
139 break;
140
141 case SPEED_100:
142 div = NSS_COMMON_CLK_DIV_RGMII_100;
143 break;
144
145 case SPEED_10:
146 div = NSS_COMMON_CLK_DIV_RGMII_10;
147 break;
148
149 default:
150 dev_err(dev, "Speed %dMbps not supported in RGMII\n", speed);
151 return -EINVAL;
152 }
153
154 return div;
155}
156
157static int ipq806x_gmac_set_speed(struct ipq806x_gmac *gmac, unsigned int speed)
158{
159 uint32_t clk_bits, val;
160 int div;
161
162 switch (gmac->phy_mode) {
163 case PHY_INTERFACE_MODE_RGMII:
164 div = get_clk_div_rgmii(gmac, speed);
165 clk_bits = NSS_COMMON_CLK_GATE_RGMII_RX_EN(gmac->id) |
166 NSS_COMMON_CLK_GATE_RGMII_TX_EN(gmac->id);
167 break;
168
169 case PHY_INTERFACE_MODE_SGMII:
170 div = get_clk_div_sgmii(gmac, speed);
171 clk_bits = NSS_COMMON_CLK_GATE_GMII_RX_EN(gmac->id) |
172 NSS_COMMON_CLK_GATE_GMII_TX_EN(gmac->id);
173 break;
174
175 default:
176 dev_err(&gmac->pdev->dev, "Unsupported PHY mode: \"%s\"\n",
177 phy_modes(gmac->phy_mode));
178 return -EINVAL;
179 }
180
181
182 regmap_read(gmac->nss_common, NSS_COMMON_CLK_GATE, &val);
183 val &= ~clk_bits;
184 regmap_write(gmac->nss_common, NSS_COMMON_CLK_GATE, val);
185
186
187 regmap_read(gmac->nss_common, NSS_COMMON_CLK_DIV0, &val);
188 val &= ~(NSS_COMMON_CLK_DIV_MASK
189 << NSS_COMMON_CLK_DIV_OFFSET(gmac->id));
190 val |= div << NSS_COMMON_CLK_DIV_OFFSET(gmac->id);
191 regmap_write(gmac->nss_common, NSS_COMMON_CLK_DIV0, val);
192
193
194 regmap_read(gmac->nss_common, NSS_COMMON_CLK_GATE, &val);
195 val |= clk_bits;
196 regmap_write(gmac->nss_common, NSS_COMMON_CLK_GATE, val);
197
198 return 0;
199}
200
201static void *ipq806x_gmac_of_parse(struct ipq806x_gmac *gmac)
202{
203 struct device *dev = &gmac->pdev->dev;
204
205 gmac->phy_mode = of_get_phy_mode(dev->of_node);
206 if (gmac->phy_mode < 0) {
207 dev_err(dev, "missing phy mode property\n");
208 return ERR_PTR(-EINVAL);
209 }
210
211 if (of_property_read_u32(dev->of_node, "qcom,id", &gmac->id) < 0) {
212 dev_err(dev, "missing qcom id property\n");
213 return ERR_PTR(-EINVAL);
214 }
215
216
217
218
219
220 if (gmac->id < 0 || gmac->id > 3) {
221 dev_err(dev, "invalid gmac id\n");
222 return ERR_PTR(-EINVAL);
223 }
224
225 gmac->core_clk = devm_clk_get(dev, "stmmaceth");
226 if (IS_ERR(gmac->core_clk)) {
227 dev_err(dev, "missing stmmaceth clk property\n");
228 return gmac->core_clk;
229 }
230 clk_set_rate(gmac->core_clk, 266000000);
231
232
233 gmac->nss_common = syscon_regmap_lookup_by_phandle(dev->of_node,
234 "qcom,nss-common");
235 if (IS_ERR(gmac->nss_common)) {
236 dev_err(dev, "missing nss-common node\n");
237 return gmac->nss_common;
238 }
239
240
241 gmac->qsgmii_csr = syscon_regmap_lookup_by_phandle(dev->of_node,
242 "qcom,qsgmii-csr");
243 if (IS_ERR(gmac->qsgmii_csr)) {
244 dev_err(dev, "missing qsgmii-csr node\n");
245 return gmac->qsgmii_csr;
246 }
247
248 return NULL;
249}
250
251static void *ipq806x_gmac_setup(struct platform_device *pdev)
252{
253 struct device *dev = &pdev->dev;
254 struct ipq806x_gmac *gmac;
255 int val;
256 void *err;
257
258 gmac = devm_kzalloc(dev, sizeof(*gmac), GFP_KERNEL);
259 if (!gmac)
260 return ERR_PTR(-ENOMEM);
261
262 gmac->pdev = pdev;
263
264 err = ipq806x_gmac_of_parse(gmac);
265 if (err) {
266 dev_err(dev, "device tree parsing error\n");
267 return err;
268 }
269
270 regmap_write(gmac->qsgmii_csr, QSGMII_PCS_CAL_LCKDT_CTL,
271 QSGMII_PCS_CAL_LCKDT_CTL_RST);
272
273
274 val = 12 << NSS_COMMON_GMAC_CTL_IFG_OFFSET |
275 12 << NSS_COMMON_GMAC_CTL_IFG_LIMIT_OFFSET;
276
277 val |= NSS_COMMON_GMAC_CTL_CSYS_REQ;
278 switch (gmac->phy_mode) {
279 case PHY_INTERFACE_MODE_RGMII:
280 val |= NSS_COMMON_GMAC_CTL_PHY_IFACE_SEL;
281 break;
282 case PHY_INTERFACE_MODE_SGMII:
283 val &= ~NSS_COMMON_GMAC_CTL_PHY_IFACE_SEL;
284 break;
285 default:
286 dev_err(&pdev->dev, "Unsupported PHY mode: \"%s\"\n",
287 phy_modes(gmac->phy_mode));
288 return NULL;
289 }
290 regmap_write(gmac->nss_common, NSS_COMMON_GMAC_CTL(gmac->id), val);
291
292
293 regmap_read(gmac->nss_common, NSS_COMMON_CLK_SRC_CTRL, &val);
294 val &= ~(1 << NSS_COMMON_CLK_SRC_CTRL_OFFSET(gmac->id));
295 switch (gmac->phy_mode) {
296 case PHY_INTERFACE_MODE_RGMII:
297 val |= NSS_COMMON_CLK_SRC_CTRL_RGMII(gmac->id) <<
298 NSS_COMMON_CLK_SRC_CTRL_OFFSET(gmac->id);
299 break;
300 case PHY_INTERFACE_MODE_SGMII:
301 val |= NSS_COMMON_CLK_SRC_CTRL_SGMII(gmac->id) <<
302 NSS_COMMON_CLK_SRC_CTRL_OFFSET(gmac->id);
303 break;
304 default:
305 dev_err(&pdev->dev, "Unsupported PHY mode: \"%s\"\n",
306 phy_modes(gmac->phy_mode));
307 return NULL;
308 }
309 regmap_write(gmac->nss_common, NSS_COMMON_CLK_SRC_CTRL, val);
310
311
312 regmap_read(gmac->nss_common, NSS_COMMON_CLK_GATE, &val);
313 val |= NSS_COMMON_CLK_GATE_PTP_EN(gmac->id);
314 regmap_write(gmac->nss_common, NSS_COMMON_CLK_GATE, val);
315
316 if (gmac->phy_mode == PHY_INTERFACE_MODE_SGMII) {
317 regmap_write(gmac->qsgmii_csr, QSGMII_PHY_SGMII_CTL(gmac->id),
318 QSGMII_PHY_CDR_EN |
319 QSGMII_PHY_RX_FRONT_EN |
320 QSGMII_PHY_RX_SIGNAL_DETECT_EN |
321 QSGMII_PHY_TX_DRIVER_EN |
322 QSGMII_PHY_QSGMII_EN |
323 0x4 << QSGMII_PHY_PHASE_LOOP_GAIN_OFFSET |
324 0x3 << QSGMII_PHY_RX_DC_BIAS_OFFSET |
325 0x1 << QSGMII_PHY_RX_INPUT_EQU_OFFSET |
326 0x2 << QSGMII_PHY_CDR_PI_SLEW_OFFSET |
327 0xC << QSGMII_PHY_TX_DRV_AMP_OFFSET);
328 }
329
330 return gmac;
331}
332
333static void ipq806x_gmac_fix_mac_speed(void *priv, unsigned int speed)
334{
335 struct ipq806x_gmac *gmac = priv;
336
337 ipq806x_gmac_set_speed(gmac, speed);
338}
339
340static const struct stmmac_of_data ipq806x_gmac_data = {
341 .has_gmac = 1,
342 .setup = ipq806x_gmac_setup,
343 .fix_mac_speed = ipq806x_gmac_fix_mac_speed,
344};
345
346static const struct of_device_id ipq806x_gmac_dwmac_match[] = {
347 { .compatible = "qcom,ipq806x-gmac", .data = &ipq806x_gmac_data },
348 { }
349};
350MODULE_DEVICE_TABLE(of, ipq806x_gmac_dwmac_match);
351
352static struct platform_driver ipq806x_gmac_dwmac_driver = {
353 .probe = stmmac_pltfr_probe,
354 .remove = stmmac_pltfr_remove,
355 .driver = {
356 .name = "ipq806x-gmac-dwmac",
357 .pm = &stmmac_pltfr_pm_ops,
358 .of_match_table = ipq806x_gmac_dwmac_match,
359 },
360};
361module_platform_driver(ipq806x_gmac_dwmac_driver);
362
363MODULE_AUTHOR("Mathieu Olivari <mathieu@codeaurora.org>");
364MODULE_DESCRIPTION("Qualcomm Atheros IPQ806x DWMAC specific glue layer");
365MODULE_LICENSE("Dual BSD/GPL");
366
