1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Buffalo Terastation Pro II/Live Board Setup |
4 | * |
5 | * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> |
6 | */ |
7 | #include <linux/gpio.h> |
8 | #include <linux/kernel.h> |
9 | #include <linux/init.h> |
10 | #include <linux/platform_device.h> |
11 | #include <linux/pci.h> |
12 | #include <linux/irq.h> |
13 | #include <linux/delay.h> |
14 | #include <linux/mtd/physmap.h> |
15 | #include <linux/mv643xx_eth.h> |
16 | #include <linux/i2c.h> |
17 | #include <linux/serial_reg.h> |
18 | #include <asm/mach-types.h> |
19 | #include <asm/mach/arch.h> |
20 | #include <asm/mach/pci.h> |
21 | #include "common.h" |
22 | #include "mpp.h" |
23 | #include "orion5x.h" |
24 | |
25 | /***************************************************************************** |
26 | * Terastation Pro 2/Live Info |
27 | ****************************************************************************/ |
28 | |
29 | /* |
30 | * Terastation Pro 2 hardware : |
31 | * - Marvell 88F5281-D0 |
32 | * - Marvell 88SX6042 SATA controller (PCI) |
33 | * - Marvell 88E1118 Gigabit Ethernet PHY |
34 | * - 256KB NOR flash |
35 | * - 128MB of DDR RAM |
36 | * - PCIe port (not equipped) |
37 | */ |
38 | |
39 | /* |
40 | * 256K NOR flash Device bus boot chip select |
41 | */ |
42 | |
43 | #define TSP2_NOR_BOOT_BASE 0xf4000000 |
44 | #define TSP2_NOR_BOOT_SIZE SZ_256K |
45 | |
46 | /***************************************************************************** |
47 | * 256KB NOR Flash on BOOT Device |
48 | ****************************************************************************/ |
49 | |
50 | static struct physmap_flash_data tsp2_nor_flash_data = { |
51 | .width = 1, |
52 | }; |
53 | |
54 | static struct resource tsp2_nor_flash_resource = { |
55 | .flags = IORESOURCE_MEM, |
56 | .start = TSP2_NOR_BOOT_BASE, |
57 | .end = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1, |
58 | }; |
59 | |
60 | static struct platform_device tsp2_nor_flash = { |
61 | .name = "physmap-flash" , |
62 | .id = 0, |
63 | .dev = { |
64 | .platform_data = &tsp2_nor_flash_data, |
65 | }, |
66 | .num_resources = 1, |
67 | .resource = &tsp2_nor_flash_resource, |
68 | }; |
69 | |
70 | /***************************************************************************** |
71 | * PCI |
72 | ****************************************************************************/ |
73 | #define TSP2_PCI_SLOT0_OFFS 7 |
74 | #define TSP2_PCI_SLOT0_IRQ_PIN 11 |
75 | |
76 | static void __init tsp2_pci_preinit(void) |
77 | { |
78 | int pin; |
79 | |
80 | /* |
81 | * Configure PCI GPIO IRQ pins |
82 | */ |
83 | pin = TSP2_PCI_SLOT0_IRQ_PIN; |
84 | if (gpio_request(gpio: pin, label: "PCI Int1" ) == 0) { |
85 | if (gpio_direction_input(gpio: pin) == 0) { |
86 | irq_set_irq_type(irq: gpio_to_irq(gpio: pin), type: IRQ_TYPE_LEVEL_LOW); |
87 | } else { |
88 | printk(KERN_ERR "tsp2_pci_preinit failed " |
89 | "to set_irq_type pin %d\n" , pin); |
90 | gpio_free(gpio: pin); |
91 | } |
92 | } else { |
93 | printk(KERN_ERR "tsp2_pci_preinit failed to " |
94 | "gpio_request %d\n" , pin); |
95 | } |
96 | } |
97 | |
98 | static int __init tsp2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
99 | { |
100 | int irq; |
101 | |
102 | /* |
103 | * Check for devices with hard-wired IRQs. |
104 | */ |
105 | irq = orion5x_pci_map_irq(dev, slot, pin); |
106 | if (irq != -1) |
107 | return irq; |
108 | |
109 | /* |
110 | * PCI IRQs are connected via GPIOs. |
111 | */ |
112 | if (slot == TSP2_PCI_SLOT0_OFFS) |
113 | return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN); |
114 | |
115 | return -1; |
116 | } |
117 | |
118 | static struct hw_pci tsp2_pci __initdata = { |
119 | .nr_controllers = 2, |
120 | .preinit = tsp2_pci_preinit, |
121 | .setup = orion5x_pci_sys_setup, |
122 | .scan = orion5x_pci_sys_scan_bus, |
123 | .map_irq = tsp2_pci_map_irq, |
124 | }; |
125 | |
126 | static int __init tsp2_pci_init(void) |
127 | { |
128 | if (machine_is_terastation_pro2()) |
129 | pci_common_init(&tsp2_pci); |
130 | |
131 | return 0; |
132 | } |
133 | |
134 | subsys_initcall(tsp2_pci_init); |
135 | |
136 | /***************************************************************************** |
137 | * Ethernet |
138 | ****************************************************************************/ |
139 | |
140 | static struct mv643xx_eth_platform_data tsp2_eth_data = { |
141 | .phy_addr = 0, |
142 | }; |
143 | |
144 | /***************************************************************************** |
145 | * RTC 5C372a on I2C bus |
146 | ****************************************************************************/ |
147 | |
148 | #define TSP2_RTC_GPIO 9 |
149 | |
150 | static struct i2c_board_info __initdata tsp2_i2c_rtc = { |
151 | I2C_BOARD_INFO("rs5c372a" , 0x32), |
152 | }; |
153 | |
154 | /***************************************************************************** |
155 | * Terastation Pro II specific power off method via UART1-attached |
156 | * microcontroller |
157 | ****************************************************************************/ |
158 | |
159 | #define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2)) |
160 | |
161 | static int tsp2_miconread(unsigned char *buf, int count) |
162 | { |
163 | int i; |
164 | int timeout; |
165 | |
166 | for (i = 0; i < count; i++) { |
167 | timeout = 10; |
168 | |
169 | while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) { |
170 | if (--timeout == 0) |
171 | break; |
172 | udelay(1000); |
173 | } |
174 | |
175 | if (timeout == 0) |
176 | break; |
177 | buf[i] = readl(UART1_REG(RX)); |
178 | } |
179 | |
180 | /* return read bytes */ |
181 | return i; |
182 | } |
183 | |
184 | static int tsp2_miconwrite(const unsigned char *buf, int count) |
185 | { |
186 | int i = 0; |
187 | |
188 | while (count--) { |
189 | while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE)) |
190 | barrier(); |
191 | writel(val: buf[i++], UART1_REG(TX)); |
192 | } |
193 | |
194 | return 0; |
195 | } |
196 | |
197 | static int tsp2_miconsend(const unsigned char *data, int count) |
198 | { |
199 | int i; |
200 | unsigned char checksum = 0; |
201 | unsigned char recv_buf[40]; |
202 | unsigned char send_buf[40]; |
203 | unsigned char correct_ack[3]; |
204 | int retry = 2; |
205 | |
206 | /* Generate checksum */ |
207 | for (i = 0; i < count; i++) |
208 | checksum -= data[i]; |
209 | |
210 | do { |
211 | /* Send data */ |
212 | tsp2_miconwrite(buf: data, count); |
213 | |
214 | /* send checksum */ |
215 | tsp2_miconwrite(buf: &checksum, count: 1); |
216 | |
217 | if (tsp2_miconread(buf: recv_buf, count: sizeof(recv_buf)) <= 3) { |
218 | printk(KERN_ERR ">%s: receive failed.\n" , __func__); |
219 | |
220 | /* send preamble to clear the receive buffer */ |
221 | memset(&send_buf, 0xff, sizeof(send_buf)); |
222 | tsp2_miconwrite(buf: send_buf, count: sizeof(send_buf)); |
223 | |
224 | /* make dummy reads */ |
225 | mdelay(100); |
226 | tsp2_miconread(buf: recv_buf, count: sizeof(recv_buf)); |
227 | } else { |
228 | /* Generate expected ack */ |
229 | correct_ack[0] = 0x01; |
230 | correct_ack[1] = data[1]; |
231 | correct_ack[2] = 0x00; |
232 | |
233 | /* checksum Check */ |
234 | if ((recv_buf[0] + recv_buf[1] + recv_buf[2] + |
235 | recv_buf[3]) & 0xFF) { |
236 | printk(KERN_ERR ">%s: Checksum Error : " |
237 | "Received data[%02x, %02x, %02x, %02x]" |
238 | "\n" , __func__, recv_buf[0], |
239 | recv_buf[1], recv_buf[2], recv_buf[3]); |
240 | } else { |
241 | /* Check Received Data */ |
242 | if (correct_ack[0] == recv_buf[0] && |
243 | correct_ack[1] == recv_buf[1] && |
244 | correct_ack[2] == recv_buf[2]) { |
245 | /* Interval for next command */ |
246 | mdelay(10); |
247 | |
248 | /* Receive ACK */ |
249 | return 0; |
250 | } |
251 | } |
252 | /* Received NAK or illegal Data */ |
253 | printk(KERN_ERR ">%s: Error : NAK or Illegal Data " |
254 | "Received\n" , __func__); |
255 | } |
256 | } while (retry--); |
257 | |
258 | /* Interval for next command */ |
259 | mdelay(10); |
260 | |
261 | return -1; |
262 | } |
263 | |
264 | static void tsp2_power_off(void) |
265 | { |
266 | const unsigned char watchdogkill[] = {0x01, 0x35, 0x00}; |
267 | const unsigned char shutdownwait[] = {0x00, 0x0c}; |
268 | const unsigned char poweroff[] = {0x00, 0x06}; |
269 | /* 38400 baud divisor */ |
270 | const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400)); |
271 | |
272 | pr_info("%s: triggering power-off...\n" , __func__); |
273 | |
274 | /* hijack uart1 and reset into sane state (38400,8n1,even parity) */ |
275 | writel(val: 0x83, UART1_REG(LCR)); |
276 | writel(val: divisor & 0xff, UART1_REG(DLL)); |
277 | writel(val: (divisor >> 8) & 0xff, UART1_REG(DLM)); |
278 | writel(val: 0x1b, UART1_REG(LCR)); |
279 | writel(val: 0x00, UART1_REG(IER)); |
280 | writel(val: 0x07, UART1_REG(FCR)); |
281 | writel(val: 0x00, UART1_REG(MCR)); |
282 | |
283 | /* Send the commands to shutdown the Terastation Pro II */ |
284 | tsp2_miconsend(data: watchdogkill, count: sizeof(watchdogkill)) ; |
285 | tsp2_miconsend(data: shutdownwait, count: sizeof(shutdownwait)) ; |
286 | tsp2_miconsend(data: poweroff, count: sizeof(poweroff)); |
287 | } |
288 | |
289 | /***************************************************************************** |
290 | * General Setup |
291 | ****************************************************************************/ |
292 | static unsigned int tsp2_mpp_modes[] __initdata = { |
293 | MPP0_PCIE_RST_OUTn, |
294 | MPP1_UNUSED, |
295 | MPP2_UNUSED, |
296 | MPP3_UNUSED, |
297 | MPP4_NAND, /* BOOT NAND Flash REn */ |
298 | MPP5_NAND, /* BOOT NAND Flash WEn */ |
299 | MPP6_NAND, /* BOOT NAND Flash HREn[0] */ |
300 | MPP7_NAND, /* BOOT NAND Flash WEn[0] */ |
301 | MPP8_GPIO, /* MICON int */ |
302 | MPP9_GPIO, /* RTC int */ |
303 | MPP10_UNUSED, |
304 | MPP11_GPIO, /* PCI Int A */ |
305 | MPP12_UNUSED, |
306 | MPP13_GPIO, /* UPS on UART0 enable */ |
307 | MPP14_GPIO, /* UPS low battery detection */ |
308 | MPP15_UNUSED, |
309 | MPP16_UART, /* UART1 RXD */ |
310 | MPP17_UART, /* UART1 TXD */ |
311 | MPP18_UART, /* UART1 CTSn */ |
312 | MPP19_UART, /* UART1 RTSn */ |
313 | 0, |
314 | }; |
315 | |
316 | static void __init tsp2_init(void) |
317 | { |
318 | /* |
319 | * Setup basic Orion functions. Need to be called early. |
320 | */ |
321 | orion5x_init(); |
322 | |
323 | orion5x_mpp_conf(mpp_list: tsp2_mpp_modes); |
324 | |
325 | /* |
326 | * Configure peripherals. |
327 | */ |
328 | mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET, |
329 | ORION_MBUS_DEVBUS_BOOT_ATTR, |
330 | TSP2_NOR_BOOT_BASE, |
331 | TSP2_NOR_BOOT_SIZE); |
332 | platform_device_register(&tsp2_nor_flash); |
333 | |
334 | orion5x_ehci0_init(); |
335 | orion5x_eth_init(eth_data: &tsp2_eth_data); |
336 | orion5x_i2c_init(); |
337 | orion5x_uart0_init(); |
338 | orion5x_uart1_init(); |
339 | |
340 | /* Get RTC IRQ and register the chip */ |
341 | if (gpio_request(TSP2_RTC_GPIO, label: "rtc" ) == 0) { |
342 | if (gpio_direction_input(TSP2_RTC_GPIO) == 0) |
343 | tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO); |
344 | else |
345 | gpio_free(TSP2_RTC_GPIO); |
346 | } |
347 | if (tsp2_i2c_rtc.irq == 0) |
348 | pr_warn("tsp2_init: failed to get RTC IRQ\n" ); |
349 | i2c_register_board_info(busnum: 0, info: &tsp2_i2c_rtc, n: 1); |
350 | |
351 | /* register Terastation Pro II specific power-off method */ |
352 | pm_power_off = tsp2_power_off; |
353 | } |
354 | |
355 | MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live" ) |
356 | /* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> */ |
357 | .atag_offset = 0x100, |
358 | .nr_irqs = ORION5X_NR_IRQS, |
359 | .init_machine = tsp2_init, |
360 | .map_io = orion5x_map_io, |
361 | .init_early = orion5x_init_early, |
362 | .init_irq = orion5x_init_irq, |
363 | .init_time = orion5x_timer_init, |
364 | .fixup = tag_fixup_mem32, |
365 | .restart = orion5x_restart, |
366 | MACHINE_END |
367 | |