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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b370e082e7
A number of the peripherals for the ep93xx are registered at startup using platform_data that is passed from the board init code to the core code. This data is then copied to a local static variable in the core code. Since the data is copied, the original data can be marked as __initdata and discarded after startup is complete. This adds the __initdata tag to all the appropriate data in the various ep93xx board init's. Specifically, all the struct ep93xx_eth_data, struct ep93xxfb_mach_info, and struct i2c_gpio_platform_data. Also, document the various registration functions and note what data should be marked as __initdata. While here, also cleanup a couple over zealous whitespace tabs. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Ryan Mallon <ryan@bluewatersys.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
173 lines
4.6 KiB
C
173 lines
4.6 KiB
C
/*
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* arch/arm/mach-ep93xx/snappercl15.c
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* Bluewater Systems Snapper CL15 system module
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*
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* Copyright (C) 2009 Bluewater Systems Ltd
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* Author: Ryan Mallon <ryan@bluewatersys.com>
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*
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* NAND code adapted from driver by:
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* Andre Renaud <andre@bluewatersys.com>
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* James R. McKaskill
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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*/
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#include <linux/platform_device.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/gpio.h>
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#include <linux/i2c.h>
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#include <linux/i2c-gpio.h>
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#include <linux/fb.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/nand.h>
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#include <mach/hardware.h>
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#include <mach/fb.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M)
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#define SNAPPERCL15_NAND_WPN (1 << 8) /* Write protect (active low) */
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#define SNAPPERCL15_NAND_ALE (1 << 9) /* Address latch */
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#define SNAPPERCL15_NAND_CLE (1 << 10) /* Command latch */
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#define SNAPPERCL15_NAND_CEN (1 << 11) /* Chip enable (active low) */
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#define SNAPPERCL15_NAND_RDY (1 << 14) /* Device ready */
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#define NAND_CTRL_ADDR(chip) (chip->IO_ADDR_W + 0x40)
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static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
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unsigned int ctrl)
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{
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struct nand_chip *chip = mtd->priv;
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static u16 nand_state = SNAPPERCL15_NAND_WPN;
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u16 set;
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if (ctrl & NAND_CTRL_CHANGE) {
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set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
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if (ctrl & NAND_NCE)
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set &= ~SNAPPERCL15_NAND_CEN;
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if (ctrl & NAND_CLE)
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set |= SNAPPERCL15_NAND_CLE;
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if (ctrl & NAND_ALE)
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set |= SNAPPERCL15_NAND_ALE;
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nand_state &= ~(SNAPPERCL15_NAND_CEN |
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SNAPPERCL15_NAND_CLE |
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SNAPPERCL15_NAND_ALE);
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nand_state |= set;
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__raw_writew(nand_state, NAND_CTRL_ADDR(chip));
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}
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if (cmd != NAND_CMD_NONE)
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__raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W);
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}
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static int snappercl15_nand_dev_ready(struct mtd_info *mtd)
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{
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struct nand_chip *chip = mtd->priv;
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return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
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}
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static const char *snappercl15_nand_part_probes[] = {"cmdlinepart", NULL};
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static struct mtd_partition snappercl15_nand_parts[] = {
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{
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.name = "Kernel",
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.offset = 0,
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.size = SZ_2M,
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},
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{
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.name = "Filesystem",
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.offset = MTDPART_OFS_APPEND,
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.size = MTDPART_SIZ_FULL,
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},
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};
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static struct platform_nand_data snappercl15_nand_data = {
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.chip = {
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.nr_chips = 1,
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.part_probe_types = snappercl15_nand_part_probes,
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.partitions = snappercl15_nand_parts,
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.nr_partitions = ARRAY_SIZE(snappercl15_nand_parts),
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.options = NAND_NO_AUTOINCR,
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.chip_delay = 25,
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},
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.ctrl = {
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.dev_ready = snappercl15_nand_dev_ready,
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.cmd_ctrl = snappercl15_nand_cmd_ctrl,
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},
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};
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static struct resource snappercl15_nand_resource[] = {
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{
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.start = SNAPPERCL15_NAND_BASE,
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.end = SNAPPERCL15_NAND_BASE + SZ_4K - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device snappercl15_nand_device = {
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.name = "gen_nand",
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.id = -1,
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.dev.platform_data = &snappercl15_nand_data,
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.resource = snappercl15_nand_resource,
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.num_resources = ARRAY_SIZE(snappercl15_nand_resource),
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};
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static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
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.phy_id = 1,
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};
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static struct i2c_gpio_platform_data __initdata snappercl15_i2c_gpio_data = {
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.sda_pin = EP93XX_GPIO_LINE_EEDAT,
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.sda_is_open_drain = 0,
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.scl_pin = EP93XX_GPIO_LINE_EECLK,
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.scl_is_open_drain = 0,
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.udelay = 0,
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.timeout = 0,
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};
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static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
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{
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/* Audio codec */
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I2C_BOARD_INFO("tlv320aic23", 0x1a),
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},
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};
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static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
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.num_modes = EP93XXFB_USE_MODEDB,
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.bpp = 16,
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};
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static void __init snappercl15_init_machine(void)
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{
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ep93xx_init_devices();
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ep93xx_register_eth(&snappercl15_eth_data, 1);
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ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
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ARRAY_SIZE(snappercl15_i2c_data));
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ep93xx_register_fb(&snappercl15_fb_info);
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platform_device_register(&snappercl15_nand_device);
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}
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MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
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/* Maintainer: Ryan Mallon <ryan@bluewatersys.com> */
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.phys_io = EP93XX_APB_PHYS_BASE,
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.io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
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.boot_params = EP93XX_SDCE0_PHYS_BASE + 0x100,
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.map_io = ep93xx_map_io,
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.init_irq = ep93xx_init_irq,
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.timer = &ep93xx_timer,
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.init_machine = snappercl15_init_machine,
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MACHINE_END
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