cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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snappercl15.c (4081B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * arch/arm/mach-ep93xx/snappercl15.c
      4 * Bluewater Systems Snapper CL15 system module
      5 *
      6 * Copyright (C) 2009 Bluewater Systems Ltd
      7 * Author: Ryan Mallon
      8 *
      9 * NAND code adapted from driver by:
     10 *   Andre Renaud <andre@bluewatersys.com>
     11 *   James R. McKaskill
     12 */
     13
     14#include <linux/platform_device.h>
     15#include <linux/kernel.h>
     16#include <linux/init.h>
     17#include <linux/io.h>
     18#include <linux/i2c.h>
     19#include <linux/fb.h>
     20
     21#include <linux/mtd/platnand.h>
     22
     23#include "hardware.h"
     24#include <linux/platform_data/video-ep93xx.h>
     25#include "gpio-ep93xx.h"
     26
     27#include <asm/mach-types.h>
     28#include <asm/mach/arch.h>
     29
     30#include "soc.h"
     31
     32#define SNAPPERCL15_NAND_BASE	(EP93XX_CS7_PHYS_BASE + SZ_16M)
     33
     34#define SNAPPERCL15_NAND_WPN	(1 << 8)  /* Write protect (active low) */
     35#define SNAPPERCL15_NAND_ALE	(1 << 9)  /* Address latch */
     36#define SNAPPERCL15_NAND_CLE	(1 << 10) /* Command latch */
     37#define SNAPPERCL15_NAND_CEN	(1 << 11) /* Chip enable (active low) */
     38#define SNAPPERCL15_NAND_RDY	(1 << 14) /* Device ready */
     39
     40#define NAND_CTRL_ADDR(chip) 	(chip->legacy.IO_ADDR_W + 0x40)
     41
     42static void snappercl15_nand_cmd_ctrl(struct nand_chip *chip, int cmd,
     43				      unsigned int ctrl)
     44{
     45	static u16 nand_state = SNAPPERCL15_NAND_WPN;
     46	u16 set;
     47
     48	if (ctrl & NAND_CTRL_CHANGE) {
     49		set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN;
     50
     51		if (ctrl & NAND_NCE)
     52			set &= ~SNAPPERCL15_NAND_CEN;
     53		if (ctrl & NAND_CLE)
     54			set |= SNAPPERCL15_NAND_CLE;
     55		if (ctrl & NAND_ALE)
     56			set |= SNAPPERCL15_NAND_ALE;
     57
     58		nand_state &= ~(SNAPPERCL15_NAND_CEN |
     59				SNAPPERCL15_NAND_CLE |
     60				SNAPPERCL15_NAND_ALE);
     61		nand_state |= set;
     62		__raw_writew(nand_state, NAND_CTRL_ADDR(chip));
     63	}
     64
     65	if (cmd != NAND_CMD_NONE)
     66		__raw_writew((cmd & 0xff) | nand_state,
     67			     chip->legacy.IO_ADDR_W);
     68}
     69
     70static int snappercl15_nand_dev_ready(struct nand_chip *chip)
     71{
     72	return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY);
     73}
     74
     75static struct mtd_partition snappercl15_nand_parts[] = {
     76	{
     77		.name		= "Kernel",
     78		.offset		= 0,
     79		.size		= SZ_2M,
     80	},
     81	{
     82		.name		= "Filesystem",
     83		.offset		= MTDPART_OFS_APPEND,
     84		.size		= MTDPART_SIZ_FULL,
     85	},
     86};
     87
     88static struct platform_nand_data snappercl15_nand_data = {
     89	.chip = {
     90		.nr_chips		= 1,
     91		.partitions		= snappercl15_nand_parts,
     92		.nr_partitions		= ARRAY_SIZE(snappercl15_nand_parts),
     93		.chip_delay		= 25,
     94	},
     95	.ctrl = {
     96		.dev_ready		= snappercl15_nand_dev_ready,
     97		.cmd_ctrl		= snappercl15_nand_cmd_ctrl,
     98	},
     99};
    100
    101static struct resource snappercl15_nand_resource[] = {
    102	{
    103		.start		= SNAPPERCL15_NAND_BASE,
    104		.end		= SNAPPERCL15_NAND_BASE + SZ_4K - 1,
    105		.flags		= IORESOURCE_MEM,
    106	},
    107};
    108
    109static struct platform_device snappercl15_nand_device = {
    110	.name			= "gen_nand",
    111	.id			= -1,
    112	.dev.platform_data	= &snappercl15_nand_data,
    113	.resource		= snappercl15_nand_resource,
    114	.num_resources		= ARRAY_SIZE(snappercl15_nand_resource),
    115};
    116
    117static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
    118	.phy_id			= 1,
    119};
    120
    121static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
    122	{
    123		/* Audio codec */
    124		I2C_BOARD_INFO("tlv320aic23", 0x1a),
    125	},
    126};
    127
    128static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
    129};
    130
    131static struct platform_device snappercl15_audio_device = {
    132	.name		= "snappercl15-audio",
    133	.id		= -1,
    134};
    135
    136static void __init snappercl15_register_audio(void)
    137{
    138	ep93xx_register_i2s();
    139	platform_device_register(&snappercl15_audio_device);
    140}
    141
    142static void __init snappercl15_init_machine(void)
    143{
    144	ep93xx_init_devices();
    145	ep93xx_register_eth(&snappercl15_eth_data, 1);
    146	ep93xx_register_i2c(snappercl15_i2c_data,
    147			    ARRAY_SIZE(snappercl15_i2c_data));
    148	ep93xx_register_fb(&snappercl15_fb_info);
    149	snappercl15_register_audio();
    150	platform_device_register(&snappercl15_nand_device);
    151}
    152
    153MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
    154	/* Maintainer: Ryan Mallon */
    155	.atag_offset	= 0x100,
    156	.nr_irqs	= NR_EP93XX_IRQS,
    157	.map_io		= ep93xx_map_io,
    158	.init_irq	= ep93xx_init_irq,
    159	.init_time	= ep93xx_timer_init,
    160	.init_machine	= snappercl15_init_machine,
    161	.restart	= ep93xx_restart,
    162MACHINE_END