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// SPDX-License-Identifier: GPL-2.0
#ifndef __SAMSUNG_H
#define __SAMSUNG_H
/*
* Driver for Samsung SoC onboard UARTs.
*
* Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
* http://armlinux.simtec.co.uk/
*/
#include <linux/dmaengine.h>
struct s3c24xx_uart_info {
char *name;
unsigned int type;
unsigned int fifosize;
unsigned long rx_fifomask;
unsigned long rx_fifoshift;
unsigned long rx_fifofull;
unsigned long tx_fifomask;
unsigned long tx_fifoshift;
unsigned long tx_fifofull;
unsigned int def_clk_sel;
unsigned long num_clks;
unsigned long clksel_mask;
unsigned long clksel_shift;
/* uart port features */
unsigned int has_divslot:1;
/* uart controls */
int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
};
struct s3c24xx_serial_drv_data {
struct s3c24xx_uart_info *info;
struct s3c2410_uartcfg *def_cfg;
unsigned int fifosize[CONFIG_SERIAL_SAMSUNG_UARTS];
};
struct s3c24xx_uart_dma {
unsigned int rx_chan_id;
unsigned int tx_chan_id;
struct dma_slave_config rx_conf;
struct dma_slave_config tx_conf;
struct dma_chan *rx_chan;
struct dma_chan *tx_chan;
dma_addr_t rx_addr;
dma_addr_t tx_addr;
dma_cookie_t rx_cookie;
dma_cookie_t tx_cookie;
char *rx_buf;
dma_addr_t tx_transfer_addr;
size_t rx_size;
size_t tx_size;
struct dma_async_tx_descriptor *tx_desc;
struct dma_async_tx_descriptor *rx_desc;
int tx_bytes_requested;
int rx_bytes_requested;
};
struct s3c24xx_uart_port {
unsigned char rx_claimed;
unsigned char tx_claimed;
unsigned int pm_level;
unsigned long baudclk_rate;
unsigned int min_dma_size;
unsigned int rx_irq;
unsigned int tx_irq;
unsigned int tx_in_progress;
unsigned int tx_mode;
unsigned int rx_mode;
struct s3c24xx_uart_info *info;
struct clk *clk;
struct clk *baudclk;
struct uart_port port;
struct s3c24xx_serial_drv_data *drv_data;
/* reference to platform data */
struct s3c2410_uartcfg *cfg;
struct s3c24xx_uart_dma *dma;
#ifdef CONFIG_ARM_S3C24XX_CPUFREQ
struct notifier_block freq_transition;
#endif
};
/* conversion functions */
#define s3c24xx_dev_to_port(__dev) dev_get_drvdata(__dev)
/* register access controls */
#define portaddr(port, reg) ((port)->membase + (reg))
#define portaddrl(port, reg) \
((unsigned long *)(unsigned long)((port)->membase + (reg)))
#define rd_regb(port, reg) (readb_relaxed(portaddr(port, reg)))
#define rd_regl(port, reg) (readl_relaxed(portaddr(port, reg)))
#define wr_regb(port, reg, val) writeb_relaxed(val, portaddr(port, reg))
#define wr_regl(port, reg, val) writel_relaxed(val, portaddr(port, reg))
/* Byte-order aware bit setting/clearing functions. */
static inline void s3c24xx_set_bit(struct uart_port *port, int idx,
unsigned int reg)
{
unsigned long flags;
u32 val;
local_irq_save(flags);
val = rd_regl(port, reg);
val |= (1 << idx);
wr_regl(port, reg, val);
local_irq_restore(flags);
}
static inline void s3c24xx_clear_bit(struct uart_port *port, int idx,
unsigned int reg)
{
unsigned long flags;
u32 val;
local_irq_save(flags);
val = rd_regl(port, reg);
val &= ~(1 << idx);
wr_regl(port, reg, val);
local_irq_restore(flags);
}
#endif
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