1 /*
2 * Cavium Networks CNS3420 Validation Board
3 *
4 * Copyright 2000 Deep Blue Solutions Ltd
5 * Copyright 2008 ARM Limited
6 * Copyright 2008 Cavium Networks
7 * Scott Shu
8 * Copyright 2010 MontaVista Software, LLC.
9 * Anton Vorontsov <avorontsov@mvista.com>
10 *
11 * This file is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License, Version 2, as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/compiler.h>
19 #include <linux/io.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/serial_core.h>
22 #include <linux/serial_8250.h>
23 #include <linux/platform_device.h>
24 #include <linux/mtd/mtd.h>
25 #include <linux/mtd/physmap.h>
26 #include <linux/mtd/partitions.h>
27 #include <linux/usb/ehci_pdriver.h>
28 #include <linux/usb/ohci_pdriver.h>
29 #include <asm/setup.h>
30 #include <asm/mach-types.h>
31 #include <asm/mach/arch.h>
32 #include <asm/mach/map.h>
33 #include <asm/mach/time.h>
34 #include "cns3xxx.h"
35 #include "pm.h"
36 #include "core.h"
37 #include "devices.h"
38
39 /*
40 * NOR Flash
41 */
42 static struct mtd_partition cns3420_nor_partitions[] = {
43 {
44 .name = "uboot",
45 .size = 0x00040000,
46 .offset = 0,
47 .mask_flags = MTD_WRITEABLE,
48 }, {
49 .name = "kernel",
50 .size = 0x004C0000,
51 .offset = MTDPART_OFS_APPEND,
52 }, {
53 .name = "filesystem",
54 .size = 0x7000000,
55 .offset = MTDPART_OFS_APPEND,
56 }, {
57 .name = "filesystem2",
58 .size = 0x0AE0000,
59 .offset = MTDPART_OFS_APPEND,
60 }, {
61 .name = "ubootenv",
62 .size = MTDPART_SIZ_FULL,
63 .offset = MTDPART_OFS_APPEND,
64 },
65 };
66
67 static struct physmap_flash_data cns3420_nor_pdata = {
68 .width = 2,
69 .parts = cns3420_nor_partitions,
70 .nr_parts = ARRAY_SIZE(cns3420_nor_partitions),
71 };
72
73 static struct resource cns3420_nor_res = {
74 .start = CNS3XXX_FLASH_BASE,
75 .end = CNS3XXX_FLASH_BASE + SZ_128M - 1,
76 .flags = IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
77 };
78
79 static struct platform_device cns3420_nor_pdev = {
80 .name = "physmap-flash",
81 .id = 0,
82 .resource = &cns3420_nor_res,
83 .num_resources = 1,
84 .dev = {
85 .platform_data = &cns3420_nor_pdata,
86 },
87 };
88
89 /*
90 * UART
91 */
cns3420_early_serial_setup(void)92 static void __init cns3420_early_serial_setup(void)
93 {
94 #ifdef CONFIG_SERIAL_8250_CONSOLE
95 static struct uart_port cns3420_serial_port = {
96 .membase = (void __iomem *)CNS3XXX_UART0_BASE_VIRT,
97 .mapbase = CNS3XXX_UART0_BASE,
98 .irq = IRQ_CNS3XXX_UART0,
99 .iotype = UPIO_MEM,
100 .flags = UPF_BOOT_AUTOCONF | UPF_FIXED_TYPE,
101 .regshift = 2,
102 .uartclk = 24000000,
103 .line = 0,
104 .type = PORT_16550A,
105 .fifosize = 16,
106 };
107
108 early_serial_setup(&cns3420_serial_port);
109 #endif
110 }
111
112 /*
113 * USB
114 */
115 static struct resource cns3xxx_usb_ehci_resources[] = {
116 [0] = {
117 .start = CNS3XXX_USB_BASE,
118 .end = CNS3XXX_USB_BASE + SZ_16M - 1,
119 .flags = IORESOURCE_MEM,
120 },
121 [1] = {
122 .start = IRQ_CNS3XXX_USB_EHCI,
123 .flags = IORESOURCE_IRQ,
124 },
125 };
126
127 static u64 cns3xxx_usb_ehci_dma_mask = DMA_BIT_MASK(32);
128
csn3xxx_usb_power_on(struct platform_device * pdev)129 static int csn3xxx_usb_power_on(struct platform_device *pdev)
130 {
131 /*
132 * EHCI and OHCI share the same clock and power,
133 * resetting twice would cause the 1st controller been reset.
134 * Therefore only do power up at the first up device, and
135 * power down at the last down device.
136 *
137 * Set USB AHB INCR length to 16
138 */
139 if (atomic_inc_return(&usb_pwr_ref) == 1) {
140 cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB);
141 cns3xxx_pwr_clk_en(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
142 cns3xxx_pwr_soft_rst(1 << PM_SOFT_RST_REG_OFFST_USB_HOST);
143 __raw_writel((__raw_readl(MISC_CHIP_CONFIG_REG) | (0X2 << 24)),
144 MISC_CHIP_CONFIG_REG);
145 }
146
147 return 0;
148 }
149
csn3xxx_usb_power_off(struct platform_device * pdev)150 static void csn3xxx_usb_power_off(struct platform_device *pdev)
151 {
152 /*
153 * EHCI and OHCI share the same clock and power,
154 * resetting twice would cause the 1st controller been reset.
155 * Therefore only do power up at the first up device, and
156 * power down at the last down device.
157 */
158 if (atomic_dec_return(&usb_pwr_ref) == 0)
159 cns3xxx_pwr_clk_dis(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
160 }
161
162 static struct usb_ehci_pdata cns3xxx_usb_ehci_pdata = {
163 .power_on = csn3xxx_usb_power_on,
164 .power_off = csn3xxx_usb_power_off,
165 };
166
167 static struct platform_device cns3xxx_usb_ehci_device = {
168 .name = "ehci-platform",
169 .num_resources = ARRAY_SIZE(cns3xxx_usb_ehci_resources),
170 .resource = cns3xxx_usb_ehci_resources,
171 .dev = {
172 .dma_mask = &cns3xxx_usb_ehci_dma_mask,
173 .coherent_dma_mask = DMA_BIT_MASK(32),
174 .platform_data = &cns3xxx_usb_ehci_pdata,
175 },
176 };
177
178 static struct resource cns3xxx_usb_ohci_resources[] = {
179 [0] = {
180 .start = CNS3XXX_USB_OHCI_BASE,
181 .end = CNS3XXX_USB_OHCI_BASE + SZ_16M - 1,
182 .flags = IORESOURCE_MEM,
183 },
184 [1] = {
185 .start = IRQ_CNS3XXX_USB_OHCI,
186 .flags = IORESOURCE_IRQ,
187 },
188 };
189
190 static u64 cns3xxx_usb_ohci_dma_mask = DMA_BIT_MASK(32);
191
192 static struct usb_ohci_pdata cns3xxx_usb_ohci_pdata = {
193 .num_ports = 1,
194 .power_on = csn3xxx_usb_power_on,
195 .power_off = csn3xxx_usb_power_off,
196 };
197
198 static struct platform_device cns3xxx_usb_ohci_device = {
199 .name = "ohci-platform",
200 .num_resources = ARRAY_SIZE(cns3xxx_usb_ohci_resources),
201 .resource = cns3xxx_usb_ohci_resources,
202 .dev = {
203 .dma_mask = &cns3xxx_usb_ohci_dma_mask,
204 .coherent_dma_mask = DMA_BIT_MASK(32),
205 .platform_data = &cns3xxx_usb_ohci_pdata,
206 },
207 };
208
209 /*
210 * Initialization
211 */
212 static struct platform_device *cns3420_pdevs[] __initdata = {
213 &cns3420_nor_pdev,
214 &cns3xxx_usb_ehci_device,
215 &cns3xxx_usb_ohci_device,
216 };
217
cns3420_init(void)218 static void __init cns3420_init(void)
219 {
220 cns3xxx_l2x0_init();
221
222 platform_add_devices(cns3420_pdevs, ARRAY_SIZE(cns3420_pdevs));
223
224 cns3xxx_ahci_init();
225 cns3xxx_sdhci_init();
226
227 pm_power_off = cns3xxx_power_off;
228 }
229
230 static struct map_desc cns3420_io_desc[] __initdata = {
231 {
232 .virtual = CNS3XXX_UART0_BASE_VIRT,
233 .pfn = __phys_to_pfn(CNS3XXX_UART0_BASE),
234 .length = SZ_4K,
235 .type = MT_DEVICE,
236 },
237 };
238
cns3420_map_io(void)239 static void __init cns3420_map_io(void)
240 {
241 cns3xxx_map_io();
242 iotable_init(cns3420_io_desc, ARRAY_SIZE(cns3420_io_desc));
243
244 cns3420_early_serial_setup();
245 }
246
247 MACHINE_START(CNS3420VB, "Cavium Networks CNS3420 Validation Board")
248 .atag_offset = 0x100,
249 .map_io = cns3420_map_io,
250 .init_irq = cns3xxx_init_irq,
251 .init_time = cns3xxx_timer_init,
252 .init_machine = cns3420_init,
253 .init_late = cns3xxx_pcie_init_late,
254 .restart = cns3xxx_restart,
255 MACHINE_END
256
