/* * Chassis LCD/LED driver for HP-PARISC workstations * * (c) Copyright 2000 Red Hat Software * (c) Copyright 2000 Helge Deller * (c) Copyright 2001-2009 Helge Deller * (c) Copyright 2001 Randolph Chung * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * TODO: * - speed-up calculations with inlined assembler * - interface to write to second row of LCD from /proc (if technically possible) * * Changes: * - Audit copy_from_user in led_proc_write. * Daniele Bellucci * - Switch from using a tasklet to a work queue, so the led_LCD_driver * can sleep. * David Pye */ #include #include /* for offsetof() */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* HZ */ #include #include #include /* The control of the LEDs and LCDs on PARISC-machines have to be done completely in software. The necessary calculations are done in a work queue task which is scheduled regularly, and since the calculations may consume a relatively large amount of CPU time, some of the calculations can be turned off with the following variables (controlled via procfs) */ static int led_type __read_mostly = -1; static unsigned char lastleds; /* LED state from most recent update */ static unsigned int led_heartbeat __read_mostly = 1; static unsigned int led_diskio __read_mostly = 1; static unsigned int led_lanrxtx __read_mostly = 1; static char lcd_text[32] __read_mostly; static char lcd_text_default[32] __read_mostly; static int lcd_no_led_support __read_mostly = 0; /* KittyHawk doesn't support LED on its LCD */ static struct workqueue_struct *led_wq; static void led_work_func(struct work_struct *); static DECLARE_DELAYED_WORK(led_task, led_work_func); #if 0 #define DPRINTK(x) printk x #else #define DPRINTK(x) #endif struct lcd_block { unsigned char command; /* stores the command byte */ unsigned char on; /* value for turning LED on */ unsigned char off; /* value for turning LED off */ }; /* Structure returned by PDC_RETURN_CHASSIS_INFO */ /* NOTE: we use unsigned long:16 two times, since the following member lcd_cmd_reg_addr needs to be 64bit aligned on 64bit PA2.0-machines */ struct pdc_chassis_lcd_info_ret_block { unsigned long model:16; /* DISPLAY_MODEL_XXXX */ unsigned long lcd_width:16; /* width of the LCD in chars (DISPLAY_MODEL_LCD only) */ unsigned long lcd_cmd_reg_addr; /* ptr to LCD cmd-register & data ptr for LED */ unsigned long lcd_data_reg_addr; /* ptr to LCD data-register (LCD only) */ unsigned int min_cmd_delay; /* delay in uS after cmd-write (LCD only) */ unsigned char reset_cmd1; /* command #1 for writing LCD string (LCD only) */ unsigned char reset_cmd2; /* command #2 for writing LCD string (LCD only) */ unsigned char act_enable; /* 0 = no activity (LCD only) */ struct lcd_block heartbeat; struct lcd_block disk_io; struct lcd_block lan_rcv; struct lcd_block lan_tx; char _pad; }; /* LCD_CMD and LCD_DATA for KittyHawk machines */ #define KITTYHAWK_LCD_CMD F_EXTEND(0xf0190000UL) /* 64bit-ready */ #define KITTYHAWK_LCD_DATA (KITTYHAWK_LCD_CMD+1) /* lcd_info is pre-initialized to the values needed to program KittyHawk LCD's * HP seems to have used Sharp/Hitachi HD44780 LCDs most of the time. */ static struct pdc_chassis_lcd_info_ret_block lcd_info __attribute__((aligned(8))) __read_mostly = { .model = DISPLAY_MODEL_LCD, .lcd_width = 16, .lcd_cmd_reg_addr = KITTYHAWK_LCD_CMD, .lcd_data_reg_addr = KITTYHAWK_LCD_DATA, .min_cmd_delay = 80, .reset_cmd1 = 0x80, .reset_cmd2 = 0xc0, }; /* direct access to some of the lcd_info variables */ #define LCD_CMD_REG lcd_info.lcd_cmd_reg_addr #define LCD_DATA_REG lcd_info.lcd_data_reg_addr #define LED_DATA_REG lcd_info.lcd_cmd_reg_addr /* LASI & ASP only */ #define LED_HASLCD 1 #define LED_NOLCD 0 /* The workqueue must be created at init-time */ static int start_task(void) { /* Display the default text now */ if (led_type == LED_HASLCD) lcd_print( lcd_text_default ); /* KittyHawk has no LED support on its LCD */ if (lcd_no_led_support) return 0; /* Create the work queue and queue the LED task */ led_wq = create_singlethread_workqueue("led_wq"); queue_delayed_work(led_wq, &led_task, 0); return 0; } device_initcall(start_task); /* ptr to LCD/LED-specific function */ static void (*led_func_ptr) (unsigned char) __read_mostly; #ifdef CONFIG_PROC_FS static int led_proc_show(struct seq_file *m, void *v) { switch ((long)m->private) { case LED_NOLCD: seq_printf(m, "Heartbeat: %d\n", led_heartbeat); seq_printf(m, "Disk IO: %d\n", led_diskio); seq_printf(m, "LAN Rx/Tx: %d\n", led_lanrxtx); break; case LED_HASLCD: seq_printf(m, "%s\n", lcd_text); break; default: return 0; } return 0; } static int led_proc_open(struct inode *inode, struct file *file) { return single_open(file, led_proc_show, PDE_DATA(inode)); } static ssize_t led_proc_write(struct file *file, const char *buf, size_t count, loff_t *pos) { void *data = PDE_DATA(file_inode(file)); char *cur, lbuf[32]; int d; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (count >= sizeof(lbuf)) count = sizeof(lbuf)-1; if (copy_from_user(lbuf, buf, count)) return -EFAULT; lbuf[count] = 0; cur = lbuf; switch ((long)data) { case LED_NOLCD: d = *cur++ - '0'; if (d != 0 && d != 1) goto parse_error; led_heartbeat = d; if (*cur++ != ' ') goto parse_error; d = *cur++ - '0'; if (d != 0 && d != 1) goto parse_error; led_diskio = d; if (*cur++ != ' ') goto parse_error; d = *cur++ - '0'; if (d != 0 && d != 1) goto parse_error; led_lanrxtx = d; break; case LED_HASLCD: if (*cur && cur[strlen(cur)-1] == '\n') cur[strlen(cur)-1] = 0; if (*cur == 0) cur = lcd_text_default; lcd_print(cur); break; default: return 0; } return count; parse_error: if ((long)data == LED_NOLCD) printk(KERN_CRIT "Parse error: expect \"n n n\" (n == 0 or 1) for heartbeat,\ndisk io and lan tx/rx indicators\n"); return -EINVAL; } static const struct file_operations led_proc_fops = { .owner = THIS_MODULE, .open = led_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = led_proc_write, }; static int __init led_create_procfs(void) { struct proc_dir_entry *proc_pdc_root = NULL; struct proc_dir_entry *ent; if (led_type == -1) return -1; proc_pdc_root = proc_mkdir("pdc", 0); if (!proc_pdc_root) return -1; if (!lcd_no_led_support) { ent = proc_create_data("led", S_IRUGO|S_IWUSR, proc_pdc_root, &led_proc_fops, (void *)LED_NOLCD); /* LED */ if (!ent) return -1; } if (led_type == LED_HASLCD) { ent = proc_create_data("lcd", S_IRUGO|S_IWUSR, proc_pdc_root, &led_proc_fops, (void *)LED_HASLCD); /* LCD */ if (!ent) return -1; } return 0; } #endif /* ** ** led_ASP_driver() ** */ #define LED_DATA 0x01 /* data to shift (0:on 1:off) */ #define LED_STROBE 0x02 /* strobe to clock data */ static void led_ASP_driver(unsigned char leds) { int i; leds = ~leds; for (i = 0; i < 8; i++) { unsigned char value; value = (leds & 0x80) >> 7; gsc_writeb( value, LED_DATA_REG ); gsc_writeb( value | LED_STROBE, LED_DATA_REG ); leds <<= 1; } } /* ** ** led_LASI_driver() ** */ static void led_LASI_driver(unsigned char leds) { leds = ~leds; gsc_writeb( leds, LED
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * cs42l51.h
 *
 * ASoC Driver for Cirrus Logic CS42L51 codecs
 *
 * Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
 */
#ifndef _CS42L51_H
#define _CS42L51_H

struct device;

extern const struct regmap_config cs42l51_regmap;
int cs42l51_probe(struct device *dev, struct regmap *regmap);
int cs42l51_remove(struct device *dev);
int __maybe_unused cs42l51_suspend(struct device *dev);
int __maybe_unused cs42l51_resume(struct device *dev);
extern const struct of_device_id cs42l51_of_match[];

#define CS42L51_CHIP_ID			0x1B
#define CS42L51_CHIP_REV_A		0x00
#define CS42L51_CHIP_REV_B		0x01
#define CS42L51_CHIP_REV_MASK		0x07

#define CS42L51_CHIP_REV_ID		0x01
#define CS42L51_MK_CHIP_REV(a, b)	((a)<<3|(b))

#define CS42L51_POWER_CTL1		0x02
#define CS42L51_POWER_CTL1_PDN_DACB	(1<<6)
#define CS42L51_POWER_CTL1_PDN_DACA	(1<<5)
#define CS42L51_POWER_CTL1_PDN_PGAB	(1<<4)
#define CS42L51_POWER_CTL1_PDN_PGAA	(1<<3)
#define CS42L51_POWER_CTL1_PDN_ADCB	(1<<2)
#define CS42L51_POWER_CTL1_PDN_ADCA	(1<<1)
#define CS42L51_POWER_CTL1_PDN		(1<<0)

#define CS42L51_MIC_POWER_CTL		0x03
#define CS42L51_MIC_POWER_CTL_AUTO	(1<<7)
#define CS42L51_MIC_POWER_CTL_SPEED(x)	(((x)&3)<<5)
#define CS42L51_QSM_MODE		3
#define CS42L51_HSM_MODE		2
#define	CS42L51_SSM_MODE		1
#define CS42L51_DSM_MODE		0
#define CS42L51_MIC_POWER_CTL_3ST_SP	(1<<4)
#define CS42L51_MIC_POWER_CTL_PDN_MICB	(1<<3)
#define CS42L51_MIC_POWER_CTL_PDN_MICA	(1<<2)
#define CS42L51_MIC_POWER_CTL_PDN_BIAS	(1<<1)
#define CS42L51_MIC_POWER_CTL_MCLK_DIV2	(1<<0)

#define CS42L51_INTF_CTL		0x04
#define CS42L51_INTF_CTL_LOOPBACK	(1<<7)
#define CS42L51_INTF_CTL_MASTER		(1<<6)
#define CS42L51_INTF_CTL_DAC_FORMAT(x)	(((x)&7)<<3)
#define CS42L51_DAC_DIF_LJ24		0x00
#define CS42L51_DAC_DIF_I2S		0x01
#define CS42L51_DAC_DIF_RJ24		0x02
#define CS42L51_DAC_DIF_RJ20		0x03
#define CS42L51_DAC_DIF_RJ18		0x04
#define CS42L51_DAC_DIF_RJ16		0x05
#define CS42L51_INTF_CTL_ADC_I2S	(1<<2)
#define CS42L51_INTF_CTL_DIGMIX		(1<<1)
#define CS42L51_INTF_CTL_MICMIX		(1<<0)

#define CS42L51_MIC_CTL			0x05
#define CS42L51_MIC_CTL_ADC_SNGVOL	(1<<7)
#define CS42L51_MIC_CTL_ADCD_DBOOST	(1<<6)
#define CS42L51_MIC_CTL_ADCA_DBOOST	(1<<5)
#define CS42L51_MIC_CTL_MICBIAS_SEL	(1<<4)
#define CS42L51_MIC_CTL_MICBIAS_LVL(x)	(((x)&3)<<2)
#define CS42L51_MIC_CTL_MICB_BOOST	(1<<1)
#define CS42L51_MIC_CTL_MICA_BOOST	(1<<0)

#define CS42L51_ADC_CTL			0x06
#define CS42L51_ADC_CTL_ADCB_HPFEN	(1<<7)
#define CS42L51_ADC_CTL_ADCB_HPFRZ	(1<<6)
#define CS42L51_ADC_CTL_ADCA_HPFEN	(1<<5)
#define CS42L51_ADC_CTL_ADCA_HPFRZ	(1<<4)
#define CS42L51_ADC_CTL_SOFTB		(1<<3)
#define CS42L51_ADC_CTL_ZCROSSB		(1<<2)
#define CS42L51_ADC_CTL_SOFTA		(1<<1)
#define CS42L51_ADC_CTL_ZCROSSA		(1<<0)

#define CS42L51_ADC_INPUT		0x07
#define CS42L51_ADC_INPUT_AINB_MUX(x)	(((x)&3)<<6)
#define CS42L51_ADC_INPUT_AINA_MUX(x)	(((x)&3)<<4)
#define CS42L51_ADC_INPUT_IN