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287 lines
6.4 KiB
287 lines
6.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* |
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* arch/xtensa/platform/xtavnet/setup.c |
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* |
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* ... |
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* |
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* Authors: Chris Zankel <[email protected]> |
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* Joe Taylor <[email protected]> |
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* |
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* Copyright 2001 - 2006 Tensilica Inc. |
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*/ |
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#include <linux/stddef.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/io.h> |
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#include <linux/errno.h> |
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#include <linux/reboot.h> |
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#include <linux/kdev_t.h> |
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#include <linux/types.h> |
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#include <linux/major.h> |
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#include <linux/console.h> |
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#include <linux/delay.h> |
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#include <linux/of.h> |
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#include <linux/clk-provider.h> |
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#include <linux/of_address.h> |
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#include <linux/slab.h> |
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#include <asm/timex.h> |
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#include <asm/processor.h> |
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#include <asm/platform.h> |
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#include <asm/bootparam.h> |
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#include <platform/lcd.h> |
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#include <platform/hardware.h> |
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void platform_halt(void) |
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{ |
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lcd_disp_at_pos(" HALT ", 0); |
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local_irq_disable(); |
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while (1) |
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cpu_relax(); |
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} |
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void platform_power_off(void) |
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{ |
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lcd_disp_at_pos("POWEROFF", 0); |
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local_irq_disable(); |
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while (1) |
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cpu_relax(); |
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} |
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void platform_restart(void) |
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{ |
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/* Flush and reset the mmu, simulate a processor reset, and |
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* jump to the reset vector. */ |
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cpu_reset(); |
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/* control never gets here */ |
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} |
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#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT |
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void __init platform_calibrate_ccount(void) |
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{ |
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ccount_freq = *(long *)XTFPGA_CLKFRQ_VADDR; |
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} |
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#endif |
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#ifdef CONFIG_OF |
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static void __init xtfpga_clk_setup(struct device_node *np) |
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{ |
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void __iomem *base = of_iomap(np, 0); |
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struct clk *clk; |
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u32 freq; |
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if (!base) { |
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pr_err("%pOFn: invalid address\n", np); |
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return; |
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} |
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freq = __raw_readl(base); |
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iounmap(base); |
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clk = clk_register_fixed_rate(NULL, np->name, NULL, 0, freq); |
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if (IS_ERR(clk)) { |
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pr_err("%pOFn: clk registration failed\n", np); |
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return; |
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} |
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if (of_clk_add_provider(np, of_clk_src_simple_get, clk)) { |
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pr_err("%pOFn: clk provider registration failed\n", np); |
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return; |
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} |
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} |
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CLK_OF_DECLARE(xtfpga_clk, "cdns,xtfpga-clock", xtfpga_clk_setup); |
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#define MAC_LEN 6 |
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static void __init update_local_mac(struct device_node *node) |
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{ |
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struct property *newmac; |
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const u8* macaddr; |
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int prop_len; |
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macaddr = of_get_property(node, "local-mac-address", &prop_len); |
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if (macaddr == NULL || prop_len != MAC_LEN) |
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return; |
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newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL); |
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if (newmac == NULL) |
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return; |
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newmac->value = newmac + 1; |
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newmac->length = MAC_LEN; |
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newmac->name = kstrdup("local-mac-address", GFP_KERNEL); |
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if (newmac->name == NULL) { |
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kfree(newmac); |
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return; |
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} |
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memcpy(newmac->value, macaddr, MAC_LEN); |
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((u8*)newmac->value)[5] = (*(u32*)DIP_SWITCHES_VADDR) & 0x3f; |
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of_update_property(node, newmac); |
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} |
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static int __init machine_setup(void) |
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{ |
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struct device_node *eth = NULL; |
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if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc"))) |
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update_local_mac(eth); |
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return 0; |
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} |
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arch_initcall(machine_setup); |
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#else |
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#include <linux/serial_8250.h> |
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#include <linux/if.h> |
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#include <net/ethoc.h> |
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#include <linux/usb/c67x00.h> |
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/*---------------------------------------------------------------------------- |
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* Ethernet -- OpenCores Ethernet MAC (ethoc driver) |
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*/ |
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static struct resource ethoc_res[] = { |
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[0] = { /* register space */ |
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.start = OETH_REGS_PADDR, |
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.end = OETH_REGS_PADDR + OETH_REGS_SIZE - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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[1] = { /* buffer space */ |
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.start = OETH_SRAMBUFF_PADDR, |
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.end = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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[2] = { /* IRQ number */ |
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.start = XTENSA_PIC_LINUX_IRQ(OETH_IRQ), |
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.end = XTENSA_PIC_LINUX_IRQ(OETH_IRQ), |
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.flags = IORESOURCE_IRQ, |
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}, |
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}; |
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static struct ethoc_platform_data ethoc_pdata = { |
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/* |
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* The MAC address for these boards is 00:50:c2:13:6f:xx. |
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* The last byte (here as zero) is read from the DIP switches on the |
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* board. |
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*/ |
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.hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 }, |
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.phy_id = -1, |
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.big_endian = XCHAL_HAVE_BE, |
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}; |
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static struct platform_device ethoc_device = { |
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.name = "ethoc", |
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.id = -1, |
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.num_resources = ARRAY_SIZE(ethoc_res), |
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.resource = ethoc_res, |
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.dev = { |
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.platform_data = ðoc_pdata, |
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}, |
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}; |
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/*---------------------------------------------------------------------------- |
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* USB Host/Device -- Cypress CY7C67300 |
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*/ |
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static struct resource c67x00_res[] = { |
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[0] = { /* register space */ |
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.start = C67X00_PADDR, |
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.end = C67X00_PADDR + C67X00_SIZE - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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[1] = { /* IRQ number */ |
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.start = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ), |
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.end = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ), |
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.flags = IORESOURCE_IRQ, |
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}, |
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}; |
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static struct c67x00_platform_data c67x00_pdata = { |
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.sie_config = C67X00_SIE1_HOST | C67X00_SIE2_UNUSED, |
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.hpi_regstep = 4, |
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}; |
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static struct platform_device c67x00_device = { |
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.name = "c67x00", |
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.id = -1, |
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.num_resources = ARRAY_SIZE(c67x00_res), |
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.resource = c67x00_res, |
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.dev = { |
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.platform_data = &c67x00_pdata, |
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}, |
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}; |
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/*---------------------------------------------------------------------------- |
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* UART |
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*/ |
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static struct resource serial_resource = { |
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.start = DUART16552_PADDR, |
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.end = DUART16552_PADDR + 0x1f, |
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.flags = IORESOURCE_MEM, |
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}; |
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static struct plat_serial8250_port serial_platform_data[] = { |
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[0] = { |
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.mapbase = DUART16552_PADDR, |
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.irq = XTENSA_PIC_LINUX_IRQ(DUART16552_INTNUM), |
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | |
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UPF_IOREMAP, |
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.iotype = XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32, |
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.regshift = 2, |
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.uartclk = 0, /* set in xtavnet_init() */ |
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}, |
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{ }, |
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}; |
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static struct platform_device xtavnet_uart = { |
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.name = "serial8250", |
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.id = PLAT8250_DEV_PLATFORM, |
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.dev = { |
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.platform_data = serial_platform_data, |
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}, |
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.num_resources = 1, |
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.resource = &serial_resource, |
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}; |
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/* platform devices */ |
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static struct platform_device *platform_devices[] __initdata = { |
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ðoc_device, |
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&c67x00_device, |
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&xtavnet_uart, |
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}; |
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static int __init xtavnet_init(void) |
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{ |
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/* Ethernet MAC address. */ |
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ethoc_pdata.hwaddr[5] = *(u32 *)DIP_SWITCHES_VADDR; |
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/* Clock rate varies among FPGA bitstreams; board specific FPGA register |
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* reports the actual clock rate. |
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*/ |
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serial_platform_data[0].uartclk = *(long *)XTFPGA_CLKFRQ_VADDR; |
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/* register platform devices */ |
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platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices)); |
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/* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user |
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* knows whether they set it correctly on the DIP switches. |
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*/ |
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pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr); |
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ethoc_pdata.eth_clkfreq = *(long *)XTFPGA_CLKFRQ_VADDR; |
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return 0; |
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} |
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/* |
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* Register to be done during do_initcalls(). |
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*/ |
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arch_initcall(xtavnet_init); |
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#endif /* CONFIG_OF */
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