1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * arch/arm/mach-mv78xx0/common.c
4 *
5 * Core functions for Marvell MV78xx0 SoCs
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/io.h>
11 #include <linux/platform_device.h>
12 #include <linux/serial_8250.h>
13 #include <linux/ata_platform.h>
14 #include <linux/clk-provider.h>
15 #include <linux/ethtool.h>
16 #include <asm/hardware/cache-feroceon-l2.h>
17 #include <asm/mach/map.h>
18 #include <asm/mach/time.h>
19 #include <linux/platform_data/usb-ehci-orion.h>
20 #include <linux/platform_data/mtd-orion_nand.h>
21 #include <plat/time.h>
22 #include <plat/common.h>
23 #include <plat/addr-map.h>
24 #include "mv78xx0.h"
25 #include "bridge-regs.h"
26 #include "common.h"
27
28 static int get_tclk(void);
29
30 /*****************************************************************************
31 * Common bits
32 ****************************************************************************/
mv78xx0_core_index(void)33 int mv78xx0_core_index(void)
34 {
35 u32 extra;
36
37 /*
38 * Read Extra Features register.
39 */
40 __asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (extra));
41
42 return !!(extra & 0x00004000);
43 }
44
get_hclk(void)45 static int get_hclk(void)
46 {
47 int hclk;
48
49 /*
50 * HCLK tick rate is configured by DEV_D[7:5] pins.
51 */
52 switch ((readl(SAMPLE_AT_RESET_LOW) >> 5) & 7) {
53 case 0:
54 hclk = 166666667;
55 break;
56 case 1:
57 hclk = 200000000;
58 break;
59 case 2:
60 hclk = 266666667;
61 break;
62 case 3:
63 hclk = 333333333;
64 break;
65 case 4:
66 hclk = 400000000;
67 break;
68 default:
69 panic("unknown HCLK PLL setting: %.8x\n",
70 readl(SAMPLE_AT_RESET_LOW));
71 }
72
73 return hclk;
74 }
75
get_pclk_l2clk(int hclk,int core_index,int * pclk,int * l2clk)76 static void get_pclk_l2clk(int hclk, int core_index, int *pclk, int *l2clk)
77 {
78 u32 cfg;
79
80 /*
81 * Core #0 PCLK/L2CLK is configured by bits [13:8], core #1
82 * PCLK/L2CLK by bits [19:14].
83 */
84 if (core_index == 0) {
85 cfg = (readl(SAMPLE_AT_RESET_LOW) >> 8) & 0x3f;
86 } else {
87 cfg = (readl(SAMPLE_AT_RESET_LOW) >> 14) & 0x3f;
88 }
89
90 /*
91 * Bits [11:8] ([17:14] for core #1) configure the PCLK:HCLK
92 * ratio (1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6).
93 */
94 *pclk = ((u64)hclk * (2 + (cfg & 0xf))) >> 1;
95
96 /*
97 * Bits [13:12] ([19:18] for core #1) configure the PCLK:L2CLK
98 * ratio (1, 2, 3).
99 */
100 *l2clk = *pclk / (((cfg >> 4) & 3) + 1);
101 }
102
get_tclk(void)103 static int get_tclk(void)
104 {
105 int tclk_freq;
106
107 /*
108 * TCLK tick rate is configured by DEV_A[2:0] strap pins.
109 */
110 switch ((readl(SAMPLE_AT_RESET_HIGH) >> 6) & 7) {
111 case 1:
112 tclk_freq = 166666667;
113 break;
114 case 3:
115 tclk_freq = 200000000;
116 break;
117 default:
118 panic("unknown TCLK PLL setting: %.8x\n",
119 readl(SAMPLE_AT_RESET_HIGH));
120 }
121
122 return tclk_freq;
123 }
124
125
126 /*****************************************************************************
127 * I/O Address Mapping
128 ****************************************************************************/
129 static struct map_desc mv78xx0_io_desc[] __initdata = {
130 {
131 .virtual = (unsigned long) MV78XX0_CORE_REGS_VIRT_BASE,
132 .pfn = 0,
133 .length = MV78XX0_CORE_REGS_SIZE,
134 .type = MT_DEVICE,
135 }, {
136 .virtual = (unsigned long) MV78XX0_REGS_VIRT_BASE,
137 .pfn = __phys_to_pfn(MV78XX0_REGS_PHYS_BASE),
138 .length = MV78XX0_REGS_SIZE,
139 .type = MT_DEVICE,
140 },
141 };
142
mv78xx0_map_io(void)143 void __init mv78xx0_map_io(void)
144 {
145 unsigned long phys;
146
147 /*
148 * Map the right set of per-core registers depending on
149 * which core we are running on.
150 */
151 if (mv78xx0_core_index() == 0) {
152 phys = MV78XX0_CORE0_REGS_PHYS_BASE;
153 } else {
154 phys = MV78XX0_CORE1_REGS_PHYS_BASE;
155 }
156 mv78xx0_io_desc[0].pfn = __phys_to_pfn(phys);
157
158 iotable_init(mv78xx0_io_desc, ARRAY_SIZE(mv78xx0_io_desc));
159 }
160
161
162 /*****************************************************************************
163 * CLK tree
164 ****************************************************************************/
165 static struct clk *tclk;
166
clk_init(void)167 static void __init clk_init(void)
168 {
169 tclk = clk_register_fixed_rate(NULL, "tclk", NULL, 0, get_tclk());
170
171 orion_clkdev_init(tclk);
172 }
173
174 /*****************************************************************************
175 * EHCI
176 ****************************************************************************/
mv78xx0_ehci0_init(void)177 void __init mv78xx0_ehci0_init(void)
178 {
179 orion_ehci_init(USB0_PHYS_BASE, IRQ_MV78XX0_USB_0, EHCI_PHY_NA);
180 }
181
182
183 /*****************************************************************************
184 * EHCI1
185 ****************************************************************************/
mv78xx0_ehci1_init(void)186 void __init mv78xx0_ehci1_init(void)
187 {
188 orion_ehci_1_init(USB1_PHYS_BASE, IRQ_MV78XX0_USB_1);
189 }
190
191
192 /*****************************************************************************
193 * EHCI2
194 ****************************************************************************/
mv78xx0_ehci2_init(void)195 void __init mv78xx0_ehci2_init(void)
196 {
197 orion_ehci_2_init(USB2_PHYS_BASE, IRQ_MV78XX0_USB_2);
198 }
199
200
201 /*****************************************************************************
202 * GE00
203 ****************************************************************************/
mv78xx0_ge00_init(struct mv643xx_eth_platform_data * eth_data)204 void __init mv78xx0_ge00_init(struct mv643xx_eth_platform_data *eth_data)
205 {
206 orion_ge00_init(eth_data,
207 GE00_PHYS_BASE, IRQ_MV78XX0_GE00_SUM,
208 IRQ_MV78XX0_GE_ERR,
209 MV643XX_TX_CSUM_DEFAULT_LIMIT);
210 }
211
212
213 /*****************************************************************************
214 * GE01
215 ****************************************************************************/
mv78xx0_ge01_init(struct mv643xx_eth_platform_data * eth_data)216 void __init mv78xx0_ge01_init(struct mv643xx_eth_platform_data *eth_data)
217 {
218 orion_ge01_init(eth_data,
219 GE01_PHYS_BASE, IRQ_MV78XX0_GE01_SUM,
220 MV643XX_TX_CSUM_DEFAULT_LIMIT);
221 }
222
223
224 /*****************************************************************************
225 * GE10
226 ****************************************************************************/
mv78xx0_ge10_init(struct mv643xx_eth_platform_data * eth_data)227 void __init mv78xx0_ge10_init(struct mv643xx_eth_platform_data *eth_data)
228 {
229 u32 dev, rev;
230
231 /*
232 * On the Z0, ge10 and ge11 are internally connected back
233 * to back, and not brought out.
234 */
235 mv78xx0_pcie_id(&dev, &rev);
236 if (dev == MV78X00_Z0_DEV_ID) {
237 eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
238 eth_data->speed = SPEED_1000;
239 eth_data->duplex = DUPLEX_FULL;
240 }
241
242 orion_ge10_init(eth_data, GE10_PHYS_BASE, IRQ_MV78XX0_GE10_SUM);
243 }
244
245
246 /*****************************************************************************
247 * GE11
248 ****************************************************************************/
mv78xx0_ge11_init(struct mv643xx_eth_platform_data * eth_data)249 void __init mv78xx0_ge11_init(struct mv643xx_eth_platform_data *eth_data)
250 {
251 u32 dev, rev;
252
253 /*
254 * On the Z0, ge10 and ge11 are internally connected back
255 * to back, and not brought out.
256 */
257 mv78xx0_pcie_id(&dev, &rev);
258 if (dev == MV78X00_Z0_DEV_ID) {
259 eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
260 eth_data->speed = SPEED_1000;
261 eth_data->duplex = DUPLEX_FULL;
262 }
263
264 orion_ge11_init(eth_data, GE11_PHYS_BASE, IRQ_MV78XX0_GE11_SUM);
265 }
266
267 /*****************************************************************************
268 * I2C
269 ****************************************************************************/
mv78xx0_i2c_init(void)270 void __init mv78xx0_i2c_init(void)
271 {
272 orion_i2c_init(I2C_0_PHYS_BASE, IRQ_MV78XX0_I2C_0, 8);
273 orion_i2c_1_init(I2C_1_PHYS_BASE, IRQ_MV78XX0_I2C_1, 8);
274 }
275
276 /*****************************************************************************
277 * SATA
278 ****************************************************************************/
mv78xx0_sata_init(struct mv_sata_platform_data * sata_data)279 void __init mv78xx0_sata_init(struct mv_sata_platform_data *sata_data)
280 {
281 orion_sata_init(sata_data, SATA_PHYS_BASE, IRQ_MV78XX0_SATA);
282 }
283
284
285 /*****************************************************************************
286 * UART0
287 ****************************************************************************/
mv78xx0_uart0_init(void)288 void __init mv78xx0_uart0_init(void)
289 {
290 orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE,
291 IRQ_MV78XX0_UART_0, tclk);
292 }
293
294
295 /*****************************************************************************
296 * UART1
297 ****************************************************************************/
mv78xx0_uart1_init(void)298 void __init mv78xx0_uart1_init(void)
299 {
300 orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE,
301 IRQ_MV78XX0_UART_1, tclk);
302 }
303
304
305 /*****************************************************************************
306 * UART2
307 ****************************************************************************/
mv78xx0_uart2_init(void)308 void __init mv78xx0_uart2_init(void)
309 {
310 orion_uart2_init(UART2_VIRT_BASE, UART2_PHYS_BASE,
311 IRQ_MV78XX0_UART_2, tclk);
312 }
313
314 /*****************************************************************************
315 * UART3
316 ****************************************************************************/
mv78xx0_uart3_init(void)317 void __init mv78xx0_uart3_init(void)
318 {
319 orion_uart3_init(UART3_VIRT_BASE, UART3_PHYS_BASE,
320 IRQ_MV78XX0_UART_3, tclk);
321 }
322
323 /*****************************************************************************
324 * Time handling
325 ****************************************************************************/
mv78xx0_init_early(void)326 void __init mv78xx0_init_early(void)
327 {
328 orion_time_set_base(TIMER_VIRT_BASE);
329 if (mv78xx0_core_index() == 0)
330 mvebu_mbus_init("marvell,mv78xx0-mbus",
331 BRIDGE_WINS_CPU0_BASE, BRIDGE_WINS_SZ,
332 DDR_WINDOW_CPU0_BASE, DDR_WINDOW_CPU_SZ);
333 else
334 mvebu_mbus_init("marvell,mv78xx0-mbus",
335 BRIDGE_WINS_CPU1_BASE, BRIDGE_WINS_SZ,
336 DDR_WINDOW_CPU1_BASE, DDR_WINDOW_CPU_SZ);
337 }
338
mv78xx0_timer_init(void)339 void __ref mv78xx0_timer_init(void)
340 {
341 orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
342 IRQ_MV78XX0_TIMER_1, get_tclk());
343 }
344
345 /****************************************************************************
346 * XOR engine
347 ****************************************************************************/
mv78xx0_xor_init(void)348 void __init mv78xx0_xor_init(void)
349 {
350 orion_xor0_init(XOR_PHYS_BASE,
351 XOR_PHYS_BASE + 0x200,
352 IRQ_MV78XX0_XOR_0, IRQ_MV78XX0_XOR_1);
353 }
354
355 /****************************************************************************
356 * Cryptographic Engines and Security Accelerator (CESA)
357 ****************************************************************************/
mv78xx0_crypto_init(void)358 void __init mv78xx0_crypto_init(void)
359 {
360 mvebu_mbus_add_window_by_id(MV78XX0_MBUS_SRAM_TARGET,
361 MV78XX0_MBUS_SRAM_ATTR,
362 MV78XX0_SRAM_PHYS_BASE,
363 MV78XX0_SRAM_SIZE);
364 orion_crypto_init(CRYPTO_PHYS_BASE, MV78XX0_SRAM_PHYS_BASE,
365 SZ_8K, IRQ_MV78XX0_CRYPTO);
366 }
367
368
369 /*****************************************************************************
370 * General
371 ****************************************************************************/
mv78xx0_id(void)372 static char * __init mv78xx0_id(void)
373 {
374 u32 dev, rev;
375
376 mv78xx0_pcie_id(&dev, &rev);
377
378 if (dev == MV78X00_Z0_DEV_ID) {
379 if (rev == MV78X00_REV_Z0)
380 return "MV78X00-Z0";
381 else
382 return "MV78X00-Rev-Unsupported";
383 } else if (dev == MV78100_DEV_ID) {
384 if (rev == MV78100_REV_A0)
385 return "MV78100-A0";
386 else if (rev == MV78100_REV_A1)
387 return "MV78100-A1";
388 else
389 return "MV78100-Rev-Unsupported";
390 } else if (dev == MV78200_DEV_ID) {
391 if (rev == MV78100_REV_A0)
392 return "MV78200-A0";
393 else
394 return "MV78200-Rev-Unsupported";
395 } else {
396 return "Device-Unknown";
397 }
398 }
399
is_l2_writethrough(void)400 static int __init is_l2_writethrough(void)
401 {
402 return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH);
403 }
404
mv78xx0_init(void)405 void __init mv78xx0_init(void)
406 {
407 int core_index;
408 int hclk;
409 int pclk;
410 int l2clk;
411
412 core_index = mv78xx0_core_index();
413 hclk = get_hclk();
414 get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);
415
416 printk(KERN_INFO "%s ", mv78xx0_id());
417 printk("core #%d, ", core_index);
418 printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
419 printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
420 printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);
421 printk("TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000);
422
423 if (IS_ENABLED(CONFIG_CACHE_FEROCEON_L2))
424 feroceon_l2_init(is_l2_writethrough());
425
426 /* Setup root of clk tree */
427 clk_init();
428 }
429
mv78xx0_restart(enum reboot_mode mode,const char * cmd)430 void mv78xx0_restart(enum reboot_mode mode, const char *cmd)
431 {
432 /*
433 * Enable soft reset to assert RSTOUTn.
434 */
435 writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
436
437 /*
438 * Assert soft reset.
439 */
440 writel(SOFT_RESET, SYSTEM_SOFT_RESET);
441
442 while (1)
443 ;
444 }
445