forked from luck/tmp_suning_uos_patched
Xtensa fixes for 4.0:
- make xtfpgs LCD driver functional and configurable. This fixes hardware lockup on KC705/ML605 boot; - wire bpf and execveat syscalls; - provide __NR_sync_file_range2 instead of __NR_sync_file_range, as that's what xtensa uses. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJU9sxSAAoJEFH5zJH4P6BEwFsP/1qkSVtBdkiCQhhTp+jTxVfT uVUST6QbG+zcqV61Ni44ghd4T0qkfGZZixlCMvDT2o3mE/dNWVZiG0rAt+q09HQ3 sUSmLaM8scUqreZRUdvLVq+wZTQH9dUhtBvssLrkFk0VJrTkNuCZo56A5d8BL7RM xD8FM2d3UVDBnG9Rs9O7guzu/lvIiYMYO9e3mOh//pY9aSDnn6fUVpoqVwx9qx7v azi8aSFDMQH4swGHojNdrRfM0eUZxyYie/fzcj1YkE5qOHo9m7ZvO1jighZc0xka qBTQV/k/5oA7hY6Ovg7PjSeZCuqWnK2nGV+wJnGJYH21JBLZvK/0NLT7UFEVDXbt 7mCbhlxgBclj5a1Vb2zfmPjw1fZ3qRJ8DNPXt8KkCPCy+HYyN6RRqjCxfBAFV/KI L26TmyfpXOtdOYX3e+vp23LFn6hdSbZbY45LCIMBW1xi4bnPczmRviXtAhZwWtTA lrE1sPzckRAjbcqsfZ5+hDZDplQKI/VlA/YTIuG78bPzecSZLLRahycYJSlDl2CQ thoyZedLN6ia838yk3B17CHxf2NFNUEoSLxIuOC0xkhJ6OkOs79duGoL4sbVQLKt 8EzVQ3p2ZmivLvRLYykUaqoq33tFleJCitANzq12k3auohDfBkpg6lFUkq6jmqP9 XRQL52qTwt52phod1S3E =y80U -----END PGP SIGNATURE----- Merge tag 'xtensa-for-next-20150304' of git://github.com/jcmvbkbc/linux-xtensa into for_next Xtensa fixes for 4.0: - make xtfpgs LCD driver functional and configurable. This fixes hardware lockup on KC705/ML605 boot; - wire bpf and execveat syscalls; - provide __NR_sync_file_range2 instead of __NR_sync_file_range, as that's what xtensa uses.
This commit is contained in:
Chris Zankel
commit
0372c1abdd
@ -428,6 +428,36 @@ config DEFAULT_MEM_SIZE
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If unsure, leave the default value here.
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config XTFPGA_LCD
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bool "Enable XTFPGA LCD driver"
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depends on XTENSA_PLATFORM_XTFPGA
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default n
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help
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There's a 2x16 LCD on most of XTFPGA boards, kernel may output
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progress messages there during bootup/shutdown. It may be useful
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during board bringup.
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If unsure, say N.
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config XTFPGA_LCD_BASE_ADDR
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hex "XTFPGA LCD base address"
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depends on XTFPGA_LCD
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default "0x0d0c0000"
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help
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Base address of the LCD controller inside KIO region.
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Different boards from XTFPGA family have LCD controller at different
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addresses. Please consult prototyping user guide for your board for
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the correct address. Wrong address here may lead to hardware lockup.
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config XTFPGA_LCD_8BIT_ACCESS
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bool "Use 8-bit access to XTFPGA LCD"
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depends on XTFPGA_LCD
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default n
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help
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LCD may be connected with 4- or 8-bit interface, 8-bit access may
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only be used with 8-bit interface. Please consult prototyping user
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guide for your board for the correct interface width.
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endmenu
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menu "Executable file formats"
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@ -715,7 +715,7 @@ __SYSCALL(323, sys_process_vm_writev, 6)
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__SYSCALL(324, sys_name_to_handle_at, 5)
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#define __NR_open_by_handle_at 325
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__SYSCALL(325, sys_open_by_handle_at, 3)
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#define __NR_sync_file_range 326
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#define __NR_sync_file_range2 326
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__SYSCALL(326, sys_sync_file_range2, 6)
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#define __NR_perf_event_open 327
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__SYSCALL(327, sys_perf_event_open, 5)
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@ -749,8 +749,12 @@ __SYSCALL(337, sys_seccomp, 3)
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__SYSCALL(338, sys_getrandom, 3)
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#define __NR_memfd_create 339
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__SYSCALL(339, sys_memfd_create, 2)
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#define __NR_bpf 340
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__SYSCALL(340, sys_bpf, 3)
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#define __NR_execveat 341
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__SYSCALL(341, sys_execveat, 5)
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#define __NR_syscall_count 340
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#define __NR_syscall_count 342
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/*
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* sysxtensa syscall handler
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@ -6,4 +6,5 @@
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#
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# Note 2! The CFLAGS definitions are in the main makefile...
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obj-y = setup.o lcd.o
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obj-y += setup.o
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obj-$(CONFIG_XTFPGA_LCD) += lcd.o
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@ -40,9 +40,6 @@
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/* UART */
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#define DUART16552_PADDR (XCHAL_KIO_PADDR + 0x0D050020)
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/* LCD instruction and data addresses. */
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#define LCD_INSTR_ADDR ((char *)IOADDR(0x0D040000))
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#define LCD_DATA_ADDR ((char *)IOADDR(0x0D040004))
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/* Misc. */
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#define XTFPGA_FPGAREGS_VADDR IOADDR(0x0D020000)
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@ -11,10 +11,25 @@
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#ifndef __XTENSA_XTAVNET_LCD_H
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#define __XTENSA_XTAVNET_LCD_H
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#ifdef CONFIG_XTFPGA_LCD
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/* Display string STR at position POS on the LCD. */
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void lcd_disp_at_pos(char *str, unsigned char pos);
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/* Shift the contents of the LCD display left or right. */
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void lcd_shiftleft(void);
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void lcd_shiftright(void);
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#else
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static inline void lcd_disp_at_pos(char *str, unsigned char pos)
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{
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}
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static inline void lcd_shiftleft(void)
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{
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}
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static inline void lcd_shiftright(void)
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{
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}
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#endif
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#endif
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@ -1,50 +1,63 @@
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/*
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* Driver for the LCD display on the Tensilica LX60 Board.
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* Driver for the LCD display on the Tensilica XTFPGA board family.
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* http://www.mytechcorp.com/cfdata/productFile/File1/MOC-16216B-B-A0A04.pdf
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001, 2006 Tensilica Inc.
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* Copyright (C) 2015 Cadence Design Systems Inc.
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*/
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/*
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*
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* FIXME: this code is from the examples from the LX60 user guide.
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*
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* The lcd_pause function does busy waiting, which is probably not
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* great. Maybe the code could be changed to use kernel timers, or
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* change the hardware to not need to wait.
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <platform/hardware.h>
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#include <platform/lcd.h>
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#include <linux/delay.h>
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#define LCD_PAUSE_ITERATIONS 4000
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/* LCD instruction and data addresses. */
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#define LCD_INSTR_ADDR ((char *)IOADDR(CONFIG_XTFPGA_LCD_BASE_ADDR))
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#define LCD_DATA_ADDR (LCD_INSTR_ADDR + 4)
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#define LCD_CLEAR 0x1
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#define LCD_DISPLAY_ON 0xc
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/* 8bit and 2 lines display */
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#define LCD_DISPLAY_MODE8BIT 0x38
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#define LCD_DISPLAY_MODE4BIT 0x28
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#define LCD_DISPLAY_POS 0x80
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#define LCD_SHIFT_LEFT 0x18
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#define LCD_SHIFT_RIGHT 0x1c
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static void lcd_put_byte(u8 *addr, u8 data)
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{
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#ifdef CONFIG_XTFPGA_LCD_8BIT_ACCESS
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ACCESS_ONCE(*addr) = data;
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#else
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ACCESS_ONCE(*addr) = data & 0xf0;
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ACCESS_ONCE(*addr) = (data << 4) & 0xf0;
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#endif
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}
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static int __init lcd_init(void)
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{
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*LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
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ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
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mdelay(5);
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*LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
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ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
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udelay(200);
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*LCD_INSTR_ADDR = LCD_DISPLAY_MODE8BIT;
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ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
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udelay(50);
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*LCD_INSTR_ADDR = LCD_DISPLAY_ON;
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#ifndef CONFIG_XTFPGA_LCD_8BIT_ACCESS
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ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE4BIT;
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udelay(50);
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*LCD_INSTR_ADDR = LCD_CLEAR;
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lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
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udelay(50);
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#endif
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lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_ON);
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udelay(50);
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lcd_put_byte(LCD_INSTR_ADDR, LCD_CLEAR);
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mdelay(10);
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lcd_disp_at_pos("XTENSA LINUX", 0);
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return 0;
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@ -52,10 +65,10 @@ static int __init lcd_init(void)
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void lcd_disp_at_pos(char *str, unsigned char pos)
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{
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*LCD_INSTR_ADDR = LCD_DISPLAY_POS | pos;
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lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_POS | pos);
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udelay(100);
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while (*str != 0) {
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*LCD_DATA_ADDR = *str;
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lcd_put_byte(LCD_DATA_ADDR, *str);
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udelay(200);
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str++;
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}
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@ -63,13 +76,13 @@ void lcd_disp_at_pos(char *str, unsigned char pos)
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void lcd_shiftleft(void)
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{
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*LCD_INSTR_ADDR = LCD_SHIFT_LEFT;
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lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_LEFT);
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udelay(50);
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}
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void lcd_shiftright(void)
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{
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*LCD_INSTR_ADDR = LCD_SHIFT_RIGHT;
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lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_RIGHT);
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udelay(50);
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}
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