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 /*****************************************************************************
347  * General
348  ****************************************************************************/
mv78xx0_id(void)349 static char * __init mv78xx0_id(void)
350 {
351 	u32 dev, rev;
352 
353 	mv78xx0_pcie_id(&dev, &rev);
354 
355 	if (dev == MV78X00_Z0_DEV_ID) {
356 		if (rev == MV78X00_REV_Z0)
357 			return "MV78X00-Z0";
358 		else
359 			return "MV78X00-Rev-Unsupported";
360 	} else if (dev == MV78100_DEV_ID) {
361 		if (rev == MV78100_REV_A0)
362 			return "MV78100-A0";
363 		else if (rev == MV78100_REV_A1)
364 			return "MV78100-A1";
365 		else
366 			return "MV78100-Rev-Unsupported";
367 	} else if (dev == MV78200_DEV_ID) {
368 		if (rev == MV78100_REV_A0)
369 			return "MV78200-A0";
370 		else
371 			return "MV78200-Rev-Unsupported";
372 	} else {
373 		return "Device-Unknown";
374 	}
375 }
376 
is_l2_writethrough(void)377 static int __init is_l2_writethrough(void)
378 {
379 	return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH);
380 }
381 
mv78xx0_init(void)382 void __init mv78xx0_init(void)
383 {
384 	int core_index;
385 	int hclk;
386 	int pclk;
387 	int l2clk;
388 
389 	core_index = mv78xx0_core_index();
390 	hclk = get_hclk();
391 	get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);
392 
393 	printk(KERN_INFO "%s ", mv78xx0_id());
394 	printk("core #%d, ", core_index);
395 	printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
396 	printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
397 	printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);
398 	printk("TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000);
399 
400 	if (IS_ENABLED(CONFIG_CACHE_FEROCEON_L2))
401 		feroceon_l2_init(is_l2_writethrough());
402 
403 	/* Setup root of clk tree */
404 	clk_init();
405 }
406 
mv78xx0_restart(enum reboot_mode mode,const char * cmd)407 void mv78xx0_restart(enum reboot_mode mode, const char *cmd)
408 {
409 	/*
410 	 * Enable soft reset to assert RSTOUTn.
411 	 */
412 	writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
413 
414 	/*
415 	 * Assert soft reset.
416 	 */
417 	writel(SOFT_RESET, SYSTEM_SOFT_RESET);
418 
419 	while (1)
420 		;
421 }
422