1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * arch/xtensa/platform/xtavnet/setup.c
8 * Authors: Chris Zankel <chris@zankel.net>
9 * Joe Taylor <joe@tensilica.com>
11 * Copyright 2001 - 2006 Tensilica Inc.
13 #include <linux/stddef.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/reboot.h>
19 #include <linux/kdev_t.h>
20 #include <linux/types.h>
21 #include <linux/major.h>
22 #include <linux/console.h>
23 #include <linux/delay.h>
25 #include <linux/clk-provider.h>
26 #include <linux/of_address.h>
28 #include <asm/timex.h>
29 #include <asm/processor.h>
30 #include <asm/platform.h>
31 #include <asm/bootparam.h>
32 #include <platform/lcd.h>
33 #include <platform/hardware.h>
35 void platform_halt(void)
37 lcd_disp_at_pos(" HALT ", 0);
43 void platform_power_off(void)
45 lcd_disp_at_pos("POWEROFF", 0);
51 void platform_restart(void)
53 /* Try software reset first. */
54 WRITE_ONCE(*(u32 *)XTFPGA_SWRST_VADDR, 0xdead);
56 /* If software reset did not work, flush and reset the mmu,
57 * simulate a processor reset, and jump to the reset vector.
60 /* control never gets here */
63 void __init platform_setup(char **cmdline)
67 /* early initialization */
69 void __init platform_init(bp_tag_t *first)
75 void platform_heartbeat(void)
79 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
81 void __init platform_calibrate_ccount(void)
83 ccount_freq = *(long *)XTFPGA_CLKFRQ_VADDR;
90 static void __init xtfpga_clk_setup(struct device_node *np)
92 void __iomem *base = of_iomap(np, 0);
97 pr_err("%pOFn: invalid address\n", np);
101 freq = __raw_readl(base);
103 clk = clk_register_fixed_rate(NULL, np->name, NULL, 0, freq);
106 pr_err("%pOFn: clk registration failed\n", np);
110 if (of_clk_add_provider(np, of_clk_src_simple_get, clk)) {
111 pr_err("%pOFn: clk provider registration failed\n", np);
115 CLK_OF_DECLARE(xtfpga_clk, "cdns,xtfpga-clock", xtfpga_clk_setup);
118 static void __init update_local_mac(struct device_node *node)
120 struct property *newmac;
124 macaddr = of_get_property(node, "local-mac-address", &prop_len);
125 if (macaddr == NULL || prop_len != MAC_LEN)
128 newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL);
132 newmac->value = newmac + 1;
133 newmac->length = MAC_LEN;
134 newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
135 if (newmac->name == NULL) {
140 memcpy(newmac->value, macaddr, MAC_LEN);
141 ((u8*)newmac->value)[5] = (*(u32*)DIP_SWITCHES_VADDR) & 0x3f;
142 of_update_property(node, newmac);
145 static int __init machine_setup(void)
147 struct device_node *eth = NULL;
149 if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
150 update_local_mac(eth);
154 arch_initcall(machine_setup);
158 #include <linux/serial_8250.h>
159 #include <linux/if.h>
160 #include <net/ethoc.h>
161 #include <linux/usb/c67x00.h>
163 /*----------------------------------------------------------------------------
164 * Ethernet -- OpenCores Ethernet MAC (ethoc driver)
167 static struct resource ethoc_res[] = {
168 [0] = { /* register space */
169 .start = OETH_REGS_PADDR,
170 .end = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
171 .flags = IORESOURCE_MEM,
173 [1] = { /* buffer space */
174 .start = OETH_SRAMBUFF_PADDR,
175 .end = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1,
176 .flags = IORESOURCE_MEM,
178 [2] = { /* IRQ number */
179 .start = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
180 .end = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
181 .flags = IORESOURCE_IRQ,
185 static struct ethoc_platform_data ethoc_pdata = {
187 * The MAC address for these boards is 00:50:c2:13:6f:xx.
188 * The last byte (here as zero) is read from the DIP switches on the
191 .hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
193 .big_endian = XCHAL_HAVE_BE,
196 static struct platform_device ethoc_device = {
199 .num_resources = ARRAY_SIZE(ethoc_res),
200 .resource = ethoc_res,
202 .platform_data = ðoc_pdata,
206 /*----------------------------------------------------------------------------
207 * USB Host/Device -- Cypress CY7C67300
210 static struct resource c67x00_res[] = {
211 [0] = { /* register space */
212 .start = C67X00_PADDR,
213 .end = C67X00_PADDR + C67X00_SIZE - 1,
214 .flags = IORESOURCE_MEM,
216 [1] = { /* IRQ number */
217 .start = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
218 .end = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
219 .flags = IORESOURCE_IRQ,
223 static struct c67x00_platform_data c67x00_pdata = {
224 .sie_config = C67X00_SIE1_HOST | C67X00_SIE2_UNUSED,
228 static struct platform_device c67x00_device = {
231 .num_resources = ARRAY_SIZE(c67x00_res),
232 .resource = c67x00_res,
234 .platform_data = &c67x00_pdata,
238 /*----------------------------------------------------------------------------
242 static struct resource serial_resource = {
243 .start = DUART16552_PADDR,
244 .end = DUART16552_PADDR + 0x1f,
245 .flags = IORESOURCE_MEM,
248 static struct plat_serial8250_port serial_platform_data[] = {
250 .mapbase = DUART16552_PADDR,
251 .irq = XTENSA_PIC_LINUX_IRQ(DUART16552_INTNUM),
252 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
254 .iotype = XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32,
256 .uartclk = 0, /* set in xtavnet_init() */
261 static struct platform_device xtavnet_uart = {
262 .name = "serial8250",
263 .id = PLAT8250_DEV_PLATFORM,
265 .platform_data = serial_platform_data,
268 .resource = &serial_resource,
271 /* platform devices */
272 static struct platform_device *platform_devices[] __initdata = {
279 static int __init xtavnet_init(void)
281 /* Ethernet MAC address. */
282 ethoc_pdata.hwaddr[5] = *(u32 *)DIP_SWITCHES_VADDR;
284 /* Clock rate varies among FPGA bitstreams; board specific FPGA register
285 * reports the actual clock rate.
287 serial_platform_data[0].uartclk = *(long *)XTFPGA_CLKFRQ_VADDR;
290 /* register platform devices */
291 platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
293 /* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user
294 * knows whether they set it correctly on the DIP switches.
296 pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr);
297 ethoc_pdata.eth_clkfreq = *(long *)XTFPGA_CLKFRQ_VADDR;
303 * Register to be done during do_initcalls().
305 arch_initcall(xtavnet_init);
307 #endif /* CONFIG_USE_OF */