1 /*-
2 * Copyright (c) 2015 Adrian Chadd <[email protected]>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include "opt_ddb.h"
31
32 #include <sys/param.h>
33 #include <sys/conf.h>
34 #include <sys/kernel.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/cons.h>
38 #include <sys/kdb.h>
39 #include <sys/reboot.h>
40
41 #include <vm/vm.h>
42 #include <vm/vm_page.h>
43
44 #include <net/ethernet.h>
45
46 #include <machine/clock.h>
47 #include <machine/cpu.h>
48 #include <machine/cpuregs.h>
49 #include <machine/hwfunc.h>
50 #include <machine/md_var.h>
51 #include <machine/trap.h>
52 #include <machine/vmparam.h>
53
54 #include <mips/atheros/ar71xxreg.h>
55 #include <mips/atheros/qca953xreg.h>
56
57 #include <mips/atheros/ar71xx_cpudef.h>
58 #include <mips/atheros/ar71xx_setup.h>
59
60 #include <mips/atheros/ar71xx_chip.h>
61
62 #include <mips/atheros/qca953x_chip.h>
63
64 static void
qca953x_chip_detect_mem_size(void)65 qca953x_chip_detect_mem_size(void)
66 {
67 }
68
69 static void
qca953x_chip_detect_sys_frequency(void)70 qca953x_chip_detect_sys_frequency(void)
71 {
72 unsigned long ref_rate;
73 unsigned long cpu_rate;
74 unsigned long ddr_rate;
75 unsigned long ahb_rate;
76 uint32_t pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv;
77 uint32_t cpu_pll, ddr_pll;
78 uint32_t bootstrap;
79
80 bootstrap = ATH_READ_REG(QCA953X_RESET_REG_BOOTSTRAP);
81 if (bootstrap & QCA953X_BOOTSTRAP_REF_CLK_40)
82 ref_rate = 40 * 1000 * 1000;
83 else
84 ref_rate = 25 * 1000 * 1000;
85
86 pll = ATH_READ_REG(QCA953X_PLL_CPU_CONFIG_REG);
87 out_div = (pll >> QCA953X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
88 QCA953X_PLL_CPU_CONFIG_OUTDIV_MASK;
89 ref_div = (pll >> QCA953X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
90 QCA953X_PLL_CPU_CONFIG_REFDIV_MASK;
91 nint = (pll >> QCA953X_PLL_CPU_CONFIG_NINT_SHIFT) &
92 QCA953X_PLL_CPU_CONFIG_NINT_MASK;
93 frac = (pll >> QCA953X_PLL_CPU_CONFIG_NFRAC_SHIFT) &
94 QCA953X_PLL_CPU_CONFIG_NFRAC_MASK;
95
96 cpu_pll = nint * ref_rate / ref_div;
97 cpu_pll += frac * (ref_rate >> 6) / ref_div;
98 cpu_pll /= (1 << out_div);
99
100 pll = ATH_READ_REG(QCA953X_PLL_DDR_CONFIG_REG);
101 out_div = (pll >> QCA953X_PLL_DDR_CONFIG_OUTDIV_SHIFT) &
102 QCA953X_PLL_DDR_CONFIG_OUTDIV_MASK;
103 ref_div = (pll >> QCA953X_PLL_DDR_CONFIG_REFDIV_SHIFT) &
104 QCA953X_PLL_DDR_CONFIG_REFDIV_MASK;
105 nint = (pll >> QCA953X_PLL_DDR_CONFIG_NINT_SHIFT) &
106 QCA953X_PLL_DDR_CONFIG_NINT_MASK;
107 frac = (pll >> QCA953X_PLL_DDR_CONFIG_NFRAC_SHIFT) &
108 QCA953X_PLL_DDR_CONFIG_NFRAC_MASK;
109
110 ddr_pll = nint * ref_rate / ref_div;
111 ddr_pll += frac * (ref_rate >> 6) / (ref_div << 4);
112 ddr_pll /= (1 << out_div);
113
114 clk_ctrl = ATH_READ_REG(QCA953X_PLL_CLK_CTRL_REG);
115
116 postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) &
117 QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_MASK;
118
119 if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPU_PLL_BYPASS)
120 cpu_rate = ref_rate;
121 else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL)
122 cpu_rate = cpu_pll / (postdiv + 1);
123 else
124 cpu_rate = ddr_pll / (postdiv + 1);
125
126 postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) &
127 QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_MASK;
128
129 if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDR_PLL_BYPASS)
130 ddr_rate = ref_rate;
131 else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL)
132 ddr_rate = ddr_pll / (postdiv + 1);
133 else
134 ddr_rate = cpu_pll / (postdiv + 1);
135
136 postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) &
137 QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_MASK;
138
139 if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHB_PLL_BYPASS)
140 ahb_rate = ref_rate;
141 else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL)
142 ahb_rate = ddr_pll / (postdiv + 1);
143 else
144 ahb_rate = cpu_pll / (postdiv + 1);
145
146 u_ar71xx_ddr_freq = ddr_rate;
147 u_ar71xx_cpu_freq = cpu_rate;
148 u_ar71xx_ahb_freq = ahb_rate;
149
150 u_ar71xx_wdt_freq = ref_rate;
151 u_ar71xx_uart_freq = ref_rate;
152 u_ar71xx_mdio_freq = ref_rate;
153 u_ar71xx_refclk = ref_rate;
154 }
155
156 static void
qca953x_chip_device_stop(uint32_t mask)157 qca953x_chip_device_stop(uint32_t mask)
158 {
159 uint32_t reg;
160
161 reg = ATH_READ_REG(QCA953X_RESET_REG_RESET_MODULE);
162 ATH_WRITE_REG(QCA953X_RESET_REG_RESET_MODULE, reg | mask);
163 }
164
165 static void
qca953x_chip_device_start(uint32_t mask)166 qca953x_chip_device_start(uint32_t mask)
167 {
168 uint32_t reg;
169
170 reg = ATH_READ_REG(QCA953X_RESET_REG_RESET_MODULE);
171 ATH_WRITE_REG(QCA953X_RESET_REG_RESET_MODULE, reg & ~mask);
172 }
173
174 static int
qca953x_chip_device_stopped(uint32_t mask)175 qca953x_chip_device_stopped(uint32_t mask)
176 {
177 uint32_t reg;
178
179 reg = ATH_READ_REG(QCA953X_RESET_REG_RESET_MODULE);
180 return ((reg & mask) == mask);
181 }
182
183 static void
qca953x_chip_set_mii_speed(uint32_t unit,uint32_t speed)184 qca953x_chip_set_mii_speed(uint32_t unit, uint32_t speed)
185 {
186
187 /* XXX TODO */
188 return;
189 }
190
191 static void
qca953x_chip_set_pll_ge(int unit,int speed,uint32_t pll)192 qca953x_chip_set_pll_ge(int unit, int speed, uint32_t pll)
193 {
194 switch (unit) {
195 case 0:
196 ATH_WRITE_REG(QCA953X_PLL_ETH_XMII_CONTROL_REG, pll);
197 break;
198 case 1:
199 /* nothing */
200 break;
201 default:
202 printf("%s: invalid PLL set for arge unit: %d\n",
203 __func__, unit);
204 return;
205 }
206 }
207
208 static void
qca953x_chip_ddr_flush(ar71xx_flush_ddr_id_t id)209 qca953x_chip_ddr_flush(ar71xx_flush_ddr_id_t id)
210 {
211
212 switch (id) {
213 case AR71XX_CPU_DDR_FLUSH_GE0:
214 ar71xx_ddr_flush(QCA953X_DDR_REG_FLUSH_GE0);
215 break;
216 case AR71XX_CPU_DDR_FLUSH_GE1:
217 ar71xx_ddr_flush(QCA953X_DDR_REG_FLUSH_GE1);
218 break;
219 case AR71XX_CPU_DDR_FLUSH_USB:
220 ar71xx_ddr_flush(QCA953X_DDR_REG_FLUSH_USB);
221 break;
222 case AR71XX_CPU_DDR_FLUSH_PCIE:
223 ar71xx_ddr_flush(QCA953X_DDR_REG_FLUSH_PCIE);
224 break;
225 case AR71XX_CPU_DDR_FLUSH_WMAC:
226 ar71xx_ddr_flush(QCA953X_DDR_REG_FLUSH_WMAC);
227 break;
228 default:
229 printf("%s: invalid flush (%d)\n", __func__, id);
230 }
231 }
232
233 static uint32_t
qca953x_chip_get_eth_pll(unsigned int mac,int speed)234 qca953x_chip_get_eth_pll(unsigned int mac, int speed)
235 {
236 uint32_t pll;
237
238 switch (speed) {
239 case 10:
240 pll = QCA953X_PLL_VAL_10;
241 break;
242 case 100:
243 pll = QCA953X_PLL_VAL_100;
244 break;
245 case 1000:
246 pll = QCA953X_PLL_VAL_1000;
247 break;
248 default:
249 printf("%s%d: invalid speed %d\n", __func__, mac, speed);
250 pll = 0;
251 }
252 return (pll);
253 }
254
255 static void
qca953x_chip_reset_ethernet_switch(void)256 qca953x_chip_reset_ethernet_switch(void)
257 {
258 }
259
260 static void
qca953x_configure_gmac(uint32_t gmac_cfg)261 qca953x_configure_gmac(uint32_t gmac_cfg)
262 {
263 uint32_t reg;
264
265 reg = ATH_READ_REG(QCA953X_GMAC_REG_ETH_CFG);
266 printf("%s: ETH_CFG=0x%08x\n", __func__, reg);
267 reg &= ~(QCA953X_ETH_CFG_SW_ONLY_MODE |
268 QCA953X_ETH_CFG_SW_PHY_SWAP |
269 QCA953X_ETH_CFG_SW_APB_ACCESS |
270 QCA953X_ETH_CFG_SW_ACC_MSB_FIRST);
271
272 reg |= gmac_cfg;
273 ATH_WRITE_REG(QCA953X_GMAC_REG_ETH_CFG, reg);
274 }
275
276 static void
qca953x_chip_init_usb_peripheral(void)277 qca953x_chip_init_usb_peripheral(void)
278 {
279 uint32_t bootstrap;
280
281 bootstrap = ATH_READ_REG(QCA953X_RESET_REG_BOOTSTRAP);
282
283 ar71xx_device_stop(QCA953X_RESET_USBSUS_OVERRIDE);
284 DELAY(1000);
285
286 ar71xx_device_start(QCA953X_RESET_USB_PHY);
287 DELAY(1000);
288
289 ar71xx_device_start(QCA953X_RESET_USB_PHY_ANALOG);
290 DELAY(1000);
291
292 ar71xx_device_start(QCA953X_RESET_USB_HOST);
293 DELAY(1000);
294 }
295
296 static void
qca953x_chip_set_mii_if(uint32_t unit,uint32_t mii_mode)297 qca953x_chip_set_mii_if(uint32_t unit, uint32_t mii_mode)
298 {
299
300 /*
301 * XXX !
302 *
303 * Nothing to see here; although gmac0 can have its
304 * MII configuration changed, the register values
305 * are slightly different.
306 */
307 }
308
309 /*
310 * XXX TODO: fetch default MII divider configuration
311 */
312
313 static void
qca953x_chip_reset_wmac(void)314 qca953x_chip_reset_wmac(void)
315 {
316
317 /* XXX TODO */
318 }
319
320 static void
qca953x_chip_init_gmac(void)321 qca953x_chip_init_gmac(void)
322 {
323 long gmac_cfg;
324
325 if (resource_long_value("qca953x_gmac", 0, "gmac_cfg",
326 &gmac_cfg) == 0) {
327 printf("%s: gmac_cfg=0x%08lx\n",
328 __func__,
329 (long) gmac_cfg);
330 qca953x_configure_gmac((uint32_t) gmac_cfg);
331 }
332 }
333
334 /*
335 * Reset the NAND Flash Controller.
336 *
337 * + active=1 means "make it active".
338 * + active=0 means "make it inactive".
339 */
340 static void
qca953x_chip_reset_nfc(int active)341 qca953x_chip_reset_nfc(int active)
342 {
343 }
344
345 /*
346 * Configure the GPIO output mux setup.
347 *
348 * The QCA953x has an output mux which allowed
349 * certain functions to be configured on any pin.
350 * Specifically, the switch PHY link LEDs and
351 * WMAC external RX LNA switches are not limited to
352 * a specific GPIO pin.
353 */
354 static void
qca953x_chip_gpio_output_configure(int gpio,uint8_t func)355 qca953x_chip_gpio_output_configure(int gpio, uint8_t func)
356 {
357 uint32_t reg, s;
358 uint32_t t;
359
360 if (gpio > QCA953X_GPIO_COUNT)
361 return;
362
363 reg = QCA953X_GPIO_REG_OUT_FUNC0 + rounddown(gpio, 4);
364 s = 8 * (gpio % 4);
365
366 /* read-modify-write */
367 t = ATH_READ_REG(AR71XX_GPIO_BASE + reg);
368 t &= ~(0xff << s);
369 t |= func << s;
370 ATH_WRITE_REG(AR71XX_GPIO_BASE + reg, t);
371
372 /* flush write */
373 ATH_READ_REG(AR71XX_GPIO_BASE + reg);
374 }
375
376 struct ar71xx_cpu_def qca953x_chip_def = {
377 &qca953x_chip_detect_mem_size,
378 &qca953x_chip_detect_sys_frequency,
379 &qca953x_chip_device_stop,
380 &qca953x_chip_device_start,
381 &qca953x_chip_device_stopped,
382 &qca953x_chip_set_pll_ge,
383 &qca953x_chip_set_mii_speed,
384 &qca953x_chip_set_mii_if,
385 &qca953x_chip_get_eth_pll,
386 &qca953x_chip_ddr_flush,
387 &qca953x_chip_init_usb_peripheral,
388 &qca953x_chip_reset_ethernet_switch,
389 &qca953x_chip_reset_wmac,
390 &qca953x_chip_init_gmac,
391 &qca953x_chip_reset_nfc,
392 &qca953x_chip_gpio_output_configure,
393 };
394