+++ /dev/null
-From c64d8ab6260330fa2fe9a2d676256697e4e2a83c Mon Sep 17 00:00:00 2001
-From: Biwen Li <biwen.li@nxp.com>
-Date: Tue, 30 Oct 2018 18:26:44 +0800
-Subject: [PATCH 31/40] ls2-console: support layerscape
-This is an integrated patch of ls2-console for
- layerscape
-
-Signed-off-by: Razvan Stefanescu <razvan.stefanescu@nxp.com>
-Signed-off-by: Biwen Li <biwen.li@nxp.com>
----
- drivers/soc/fsl/ls2-console/Kconfig | 4 +
- drivers/soc/fsl/ls2-console/Makefile | 1 +
- drivers/soc/fsl/ls2-console/ls2-console.c | 284 ++++++++++++++++++++++
- 3 files changed, 289 insertions(+)
- create mode 100644 drivers/soc/fsl/ls2-console/Kconfig
- create mode 100644 drivers/soc/fsl/ls2-console/Makefile
- create mode 100644 drivers/soc/fsl/ls2-console/ls2-console.c
-
---- /dev/null
-+++ b/drivers/soc/fsl/ls2-console/Kconfig
-@@ -0,0 +1,4 @@
-+config FSL_LS2_CONSOLE
-+ tristate "Layerscape MC and AIOP console support"
-+ depends on ARCH_LAYERSCAPE
-+ default y
---- /dev/null
-+++ b/drivers/soc/fsl/ls2-console/Makefile
-@@ -0,0 +1 @@
-+obj-$(CONFIG_FSL_LS2_CONSOLE) += ls2-console.o
---- /dev/null
-+++ b/drivers/soc/fsl/ls2-console/ls2-console.c
-@@ -0,0 +1,284 @@
-+/* Copyright 2015-2016 Freescale Semiconductor Inc.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions are met:
-+ * * Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions and the following disclaimer.
-+ * * Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * * Neither the name of the above-listed copyright holders nor the
-+ * names of any contributors may be used to endorse or promote products
-+ * derived from this software without specific prior written permission.
-+ *
-+ *
-+ * ALTERNATIVELY, this software may be distributed under the terms of the
-+ * GNU General Public License ("GPL") as published by the Free Software
-+ * Foundation, either version 2 of that License or (at your option) any
-+ * later version.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
-+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-+ * POSSIBILITY OF SUCH DAMAGE.
-+ */
-+
-+#include <linux/miscdevice.h>
-+#include <linux/uaccess.h>
-+#include <linux/poll.h>
-+#include <linux/compat.h>
-+#include <linux/module.h>
-+#include <linux/slab.h>
-+#include <linux/io.h>
-+
-+/* SoC address for the MC firmware base low/high registers */
-+#define SOC_CCSR_MC_FW_BASE_ADDR_REGS 0x8340020
-+#define SOC_CCSR_MC_FW_BASE_ADDR_REGS_SIZE 2
-+/* MC firmware base low/high registers indexes */
-+#define MCFBALR_OFFSET 0
-+#define MCFBAHR_OFFSET 1
-+
-+/* Bit mask used to obtain the most significant part of the MC base address */
-+#define MC_FW_HIGH_ADDR_MASK 0x1FFFF
-+/* Bit mask used to obtain the least significant part of the MC base address */
-+#define MC_FW_LOW_ADDR_MASK 0xE0000000
-+
-+#define MC_BUFFER_OFFSET 0x01000000
-+#define MC_BUFFER_SIZE (1024*1024*16)
-+#define MC_OFFSET_DELTA (MC_BUFFER_OFFSET)
-+
-+#define AIOP_BUFFER_OFFSET 0x06000000
-+#define AIOP_BUFFER_SIZE (1024*1024*16)
-+#define AIOP_OFFSET_DELTA (0)
-+
-+struct log_header {
-+ char magic_word[8]; /* magic word */
-+ uint32_t buf_start; /* holds the 32-bit little-endian
-+ * offset of the start of the buffer
-+ */
-+ uint32_t buf_length; /* holds the 32-bit little-endian
-+ * length of the buffer
-+ */
-+ uint32_t last_byte; /* holds the 32-bit little-endian offset
-+ * of the byte after the last byte that
-+ * was written
-+ */
-+ char reserved[44];
-+};
-+
-+#define LOG_HEADER_FLAG_BUFFER_WRAPAROUND 0x80000000
-+#define LOG_VERSION_MAJOR 1
-+#define LOG_VERSION_MINOR 0
-+
-+
-+#define invalidate(p) { asm volatile("dc ivac, %0" : : "r" (p) : "memory"); }
-+
-+struct console_data {
-+ char *map_addr;
-+ struct log_header *hdr;
-+ char *start_addr; /* Start of buffer */
-+ char *end_addr; /* End of buffer */
-+ char *end_of_data; /* Current end of data */
-+ char *cur_ptr; /* Last data sent to console */
-+};
-+
-+#define LAST_BYTE(a) ((a) & ~(LOG_HEADER_FLAG_BUFFER_WRAPAROUND))
-+
-+static inline void __adjust_end(struct console_data *cd)
-+{
-+ cd->end_of_data = cd->start_addr
-+ + LAST_BYTE(le32_to_cpu(cd->hdr->last_byte));
-+}
-+
-+static inline void adjust_end(struct console_data *cd)
-+{
-+ invalidate(cd->hdr);
-+ __adjust_end(cd);
-+}
-+
-+static inline uint64_t get_mc_fw_base_address(void)
-+{
-+ u32 *mcfbaregs = (u32 *) ioremap(SOC_CCSR_MC_FW_BASE_ADDR_REGS,
-+ SOC_CCSR_MC_FW_BASE_ADDR_REGS_SIZE);
-+ u64 mcfwbase = 0ULL;
-+
-+ mcfwbase = readl(mcfbaregs + MCFBAHR_OFFSET) & MC_FW_HIGH_ADDR_MASK;
-+ mcfwbase <<= 32;
-+ mcfwbase |= readl(mcfbaregs + MCFBALR_OFFSET) & MC_FW_LOW_ADDR_MASK;
-+ iounmap(mcfbaregs);
-+ pr_info("fsl-ls2-console: MC base address at 0x%016llx\n", mcfwbase);
-+ return mcfwbase;
-+}
-+
-+static int fsl_ls2_generic_console_open(struct inode *node, struct file *fp,
-+ u64 offset, u64 size,
-+ uint8_t *emagic, uint8_t magic_len,
-+ u32 offset_delta)
-+{
-+ struct console_data *cd;
-+ uint8_t *magic;
-+ uint32_t wrapped;
-+
-+ cd = kmalloc(sizeof(*cd), GFP_KERNEL);
-+ if (cd == NULL)
-+ return -ENOMEM;
-+ fp->private_data = cd;
-+ cd->map_addr = ioremap(get_mc_fw_base_address() + offset, size);
-+
-+ cd->hdr = (struct log_header *) cd->map_addr;
-+ invalidate(cd->hdr);
-+
-+ magic = cd->hdr->magic_word;
-+ if (memcmp(magic, emagic, magic_len)) {
-+ pr_info("magic didn't match!\n");
-+ pr_info("expected: %02x %02x %02x %02x %02x %02x %02x %02x\n",
-+ emagic[0], emagic[1], emagic[2], emagic[3],
-+ emagic[4], emagic[5], emagic[6], emagic[7]);
-+ pr_info(" seen: %02x %02x %02x %02x %02x %02x %02x %02x\n",
-+ magic[0], magic[1], magic[2], magic[3],
-+ magic[4], magic[5], magic[6], magic[7]);
-+ kfree(cd);
-+ iounmap(cd->map_addr);
-+ return -EIO;
-+ }
-+
-+ cd->start_addr = cd->map_addr
-+ + le32_to_cpu(cd->hdr->buf_start) - offset_delta;
-+ cd->end_addr = cd->start_addr + le32_to_cpu(cd->hdr->buf_length);
-+
-+ wrapped = le32_to_cpu(cd->hdr->last_byte)
-+ & LOG_HEADER_FLAG_BUFFER_WRAPAROUND;
-+
-+ __adjust_end(cd);
-+ if (wrapped && (cd->end_of_data != cd->end_addr))
-+ cd->cur_ptr = cd->end_of_data+1;
-+ else
-+ cd->cur_ptr = cd->start_addr;
-+
-+ return 0;
-+}
-+
-+static int fsl_ls2_mc_console_open(struct inode *node, struct file *fp)
-+{
-+ uint8_t magic_word[] = { 0, 1, 'C', 'M' };
-+
-+ return fsl_ls2_generic_console_open(node, fp,
-+ MC_BUFFER_OFFSET, MC_BUFFER_SIZE,
-+ magic_word, sizeof(magic_word),
-+ MC_OFFSET_DELTA);
-+}
-+
-+static int fsl_ls2_aiop_console_open(struct inode *node, struct file *fp)
-+{
-+ uint8_t magic_word[] = { 'P', 'O', 'I', 'A' };
-+
-+ return fsl_ls2_generic_console_open(node, fp,
-+ AIOP_BUFFER_OFFSET, AIOP_BUFFER_SIZE,
-+ magic_word, sizeof(magic_word),
-+ AIOP_OFFSET_DELTA);
-+}
-+
-+static int fsl_ls2_console_close(struct inode *node, struct file *fp)
-+{
-+ struct console_data *cd = fp->private_data;
-+
-+ iounmap(cd->map_addr);
-+ kfree(cd);
-+ return 0;
-+}
-+
-+ssize_t fsl_ls2_console_read(struct file *fp, char __user *buf, size_t count,
-+ loff_t *f_pos)
-+{
-+ struct console_data *cd = fp->private_data;
-+ size_t bytes = 0;
-+ char data;
-+
-+ /* Check if we need to adjust the end of data addr */
-+ adjust_end(cd);
-+
-+ while ((count != bytes) && (cd->end_of_data != cd->cur_ptr)) {
-+ if (((u64)cd->cur_ptr) % 64 == 0)
-+ invalidate(cd->cur_ptr);
-+
-+ data = *(cd->cur_ptr);
-+ if (copy_to_user(&buf[bytes], &data, 1))
-+ return -EFAULT;
-+ cd->cur_ptr++;
-+ if (cd->cur_ptr >= cd->end_addr)
-+ cd->cur_ptr = cd->start_addr;
-+ ++bytes;
-+ }
-+ return bytes;
-+}
-+
-+static const struct file_operations fsl_ls2_mc_console_fops = {
-+ .owner = THIS_MODULE,
-+ .open = fsl_ls2_mc_console_open,
-+ .release = fsl_ls2_console_close,
-+ .read = fsl_ls2_console_read,
-+};
-+
-+static struct miscdevice fsl_ls2_mc_console_dev = {
-+ .minor = MISC_DYNAMIC_MINOR,
-+ .name = "fsl_mc_console",
-+ .fops = &fsl_ls2_mc_console_fops
-+};
-+
-+static const struct file_operations fsl_ls2_aiop_console_fops = {
-+ .owner = THIS_MODULE,
-+ .open = fsl_ls2_aiop_console_open,
-+ .release = fsl_ls2_console_close,
-+ .read = fsl_ls2_console_read,
-+};
-+
-+static struct miscdevice fsl_ls2_aiop_console_dev = {
-+ .minor = MISC_DYNAMIC_MINOR,
-+ .name = "fsl_aiop_console",
-+ .fops = &fsl_ls2_aiop_console_fops
-+};
-+
-+static int __init fsl_ls2_console_init(void)
-+{
-+ int err = 0;
-+
-+ pr_info("Freescale LS2 console driver\n");
-+ err = misc_register(&fsl_ls2_mc_console_dev);
-+ if (err) {
-+ pr_err("fsl_mc_console: cannot register device\n");
-+ return err;
-+ }
-+ pr_info("fsl-ls2-console: device %s registered\n",
-+ fsl_ls2_mc_console_dev.name);
-+
-+ err = misc_register(&fsl_ls2_aiop_console_dev);
-+ if (err) {
-+ pr_err("fsl_aiop_console: cannot register device\n");
-+ return err;
-+ }
-+ pr_info("fsl-ls2-console: device %s registered\n",
-+ fsl_ls2_aiop_console_dev.name);
-+
-+ return 0;
-+}
-+
-+static void __exit fsl_ls2_console_exit(void)
-+{
-+ misc_deregister(&fsl_ls2_mc_console_dev);
-+
-+ misc_deregister(&fsl_ls2_aiop_console_dev);
-+}
-+
-+module_init(fsl_ls2_console_init);
-+module_exit(fsl_ls2_console_exit);
-+
-+MODULE_AUTHOR("Roy Pledge <roy.pledge@freescale.com>");
-+MODULE_LICENSE("Dual BSD/GPL");
-+MODULE_DESCRIPTION("Freescale LS2 console driver");
projects / openwrt / staging / wigyori.git / blobdiff