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Merge pull request #1810 from mdlemay/conf-serial-baud

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x86: Support configurable UART baud rate and fix initialization
This commit is contained in:
Nicolas Tsiftes 2016-08-08 11:36:55 +02:00 committed by GitHub
parent e0fcbe672f bde8eb35ae
commit c535c5b82f
5 changed files with 45 additions and 16 deletions
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20
cpu/x86/drivers/legacy_pc/uart-16x50.c
View file

@ -140,6 +140,18 @@ SYSCALLS_DEFINE(uart_16x50_tx, uart_16x50_driver_t c_this, uint8_t c)
prot_domains_disable_mmio();
}
/*---------------------------------------------------------------------------*/
/**
* \brief Perform common initialization that must precede per-port
* initialization.
*/
/*---------------------------------------------------------------------------*/
void
uart_16x50_init(void)
{
SYSCALLS_INIT(uart_16x50_setup);
SYSCALLS_INIT(uart_16x50_tx);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Initialize an MMIO-programmable 16X50 UART.
* \param c_this Structure that will be initialized to represent the device.
@ -147,9 +159,9 @@ SYSCALLS_DEFINE(uart_16x50_tx, uart_16x50_driver_t c_this, uint8_t c)
* \param dl Divisor setting to configure the baud rate.
*/
void
uart_16x50_init(uart_16x50_driver_t ATTR_KERN_ADDR_SPACE *c_this,
pci_config_addr_t pci_addr,
uint16_t dl)
uart_16x50_init_port(uart_16x50_driver_t ATTR_KERN_ADDR_SPACE *c_this,
pci_config_addr_t pci_addr,
uint16_t dl)
{
uart_16x50_driver_t loc_c_this;
@ -157,9 +169,7 @@ uart_16x50_init(uart_16x50_driver_t ATTR_KERN_ADDR_SPACE *c_this,
* firmware during boot.
*/
pci_init(c_this, pci_addr, UART_MMIO_SZ, 0, 0);
SYSCALLS_INIT(uart_16x50_setup);
SYSCALLS_AUTHZ(uart_16x50_setup, *c_this);
SYSCALLS_INIT(uart_16x50_tx);
SYSCALLS_AUTHZ(uart_16x50_tx, *c_this);
prot_domains_copy_dcd(&loc_c_this, c_this);

8
cpu/x86/drivers/legacy_pc/uart-16x50.h
View file

@ -35,9 +35,11 @@
typedef pci_driver_t uart_16x50_driver_t;
void uart_16x50_init(uart_16x50_driver_t ATTR_KERN_ADDR_SPACE *c_this,
pci_config_addr_t pci_addr,
uint16_t dl);
void uart_16x50_init(void);
void uart_16x50_init_port(uart_16x50_driver_t ATTR_KERN_ADDR_SPACE *c_this,
pci_config_addr_t pci_addr,
uint16_t dl);
void uart_16x50_tx(uart_16x50_driver_t c_this, uint8_t c);

23
cpu/x86/drivers/quarkX1000/uart.c
View file

@ -35,19 +35,30 @@
PROT_DOMAINS_ALLOC(uart_16x50_driver_t, quarkX1000_uart0);
PROT_DOMAINS_ALLOC(uart_16x50_driver_t, quarkX1000_uart1);
/* Divisor setting for 115200 baud from section 18.2.2 of Intel Quark SoC
* X1000 Datasheet.
/* UART base frequency from section 18.2.2 of Intel Quark SoC X1000
* Datasheet.
*/
#define QUARK_X1000_UART_DL_115200 24
#define QUARK_X1000_UART_FBASE 44236800
/*---------------------------------------------------------------------------*/
/**
* \brief Perform common initialization that must precede per-port
* initialization.
*/
void
quarkX1000_uart_init(void)
{
uart_16x50_init();
}
/*---------------------------------------------------------------------------*/
/**
* \brief Initialize a UART.
* \param dev Device to initialize.
*/
void
quarkX1000_uart_init(quarkX1000_uart_dev_t dev)
quarkX1000_uart_init_port(quarkX1000_uart_dev_t dev, unsigned baud)
{
uint16_t dl;
pci_config_addr_t pci_addr;
uart_16x50_driver_t ATTR_KERN_ADDR_SPACE *drv;
@ -67,7 +78,9 @@ quarkX1000_uart_init(quarkX1000_uart_dev_t dev)
drv = &quarkX1000_uart1;
PROT_DOMAINS_INIT_ID(quarkX1000_uart1);
}
uart_16x50_init(drv, pci_addr, QUARK_X1000_UART_DL_115200);
/* Divisor setting from section 18.2.2 of Intel Quark SoC X1000 Datasheet. */
dl = QUARK_X1000_UART_FBASE / (16 * baud);
uart_16x50_init_port(drv, pci_addr, dl);
}
/*---------------------------------------------------------------------------*/
/**

3
cpu/x86/drivers/quarkX1000/uart.h
View file

@ -38,7 +38,8 @@ typedef enum {
QUARK_X1000_UART_1
} quarkX1000_uart_dev_t;
void quarkX1000_uart_init(quarkX1000_uart_dev_t dev);
void quarkX1000_uart_init(void);
void quarkX1000_uart_init_port(quarkX1000_uart_dev_t dev, unsigned baud);
void quarkX1000_uart_tx(quarkX1000_uart_dev_t dev, uint8_t c);
#endif /* CPU_X86_DRIVERS_QUARKX1000_UART_H_ */

7
platform/galileo/contiki-main.c
View file

@ -86,8 +86,11 @@ main(void)
quarkX1000_imr_conf();
#endif
irq_init();
/* Initialize UART connected to Galileo Gen2 FTDI header */
quarkX1000_uart_init(QUARK_X1000_UART_1);
quarkX1000_uart_init();
/* Initialize UART connected to Galileo Gen1 3.5mm audio-style jack or
* Galileo Gen2 FTDI header
*/
quarkX1000_uart_init_port(QUARK_X1000_UART_1, 115200);
clock_init();
rtimer_init();