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drivers: ns16550: use DEVICE_MMIO where needed

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This gets a little complicated as the driver could be
using PCI-E MMIO, MMIO specified by DTS, or I/O ports.
This driver doesn't use struct uart_device_config any
more.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2020-07-15 09:03:11 -07:00 • committed by Carles Cufí
commit d728bece0a
2 changed files with 39 additions and 20 deletions
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49
drivers/serial/uart_ns16550.c
View file

@ -256,12 +256,18 @@ BUILD_ASSERT(IS_ENABLED(CONFIG_PCIE), "NS16550(s) in DT need CONFIG_PCIE");
/* device config */
struct uart_ns16550_device_config {
struct uart_device_config devconf;
#ifndef UART_NS16550_ACCESS_IOPORT
DEVICE_MMIO_ROM;
#else
uint32_t port;
#endif
uint32_t sys_clk_freq;
#if defined(CONFIG_UART_INTERRUPT_DRIVEN) || defined(CONFIG_UART_ASYNC_API)
uart_irq_config_func_t irq_config_func;
#endif
#ifdef UART_NS16550_PCP_ENABLED
uint32_t pcp;
#endif
#ifdef UART_NS16550_PCIE_ENABLED
bool pcie;
pcie_bdf_t pcie_bdf;
@ -271,8 +277,8 @@ struct uart_ns16550_device_config {
/** Device data structure */
struct uart_ns16550_dev_data_t {
#ifdef UART_NS16550_PCIE_ENABLED
uint64_t pcimem;
#ifndef UART_NS16550_ACCESS_IOPORT
DEVICE_MMIO_RAM;
#endif
struct uart_config uart_config;
struct k_spinlock lock;
@ -292,13 +298,11 @@ static const struct uart_driver_api uart_ns16550_driver_api;
static inline uintptr_t get_port(struct device *dev)
{
#ifdef UART_NS16550_PCIE_ENABLED
if (DEV_CFG(dev)->pcie) {
return (uintptr_t) DEV_DATA(dev)->pcimem;
}
#endif /* UART_NS16550_PCIE_ENABLED */
return DEV_CFG(dev)->devconf.port;
#ifndef UART_NS16550_ACCESS_IOPORT
return DEVICE_MMIO_GET(dev);
#else
return DEV_CFG(dev)->port;
#endif
}
static void set_baud_rate(struct device *dev, uint32_t baud_rate)
@ -308,12 +312,12 @@ static void set_baud_rate(struct device *dev, uint32_t baud_rate)
uint32_t divisor; /* baud rate divisor */
uint8_t lcr_cache;
if ((baud_rate != 0U) && (dev_cfg->devconf.sys_clk_freq != 0U)) {
if ((baud_rate != 0U) && (dev_cfg->sys_clk_freq != 0U)) {
/*
* calculate baud rate divisor. a variant of
* (uint32_t)(dev_cfg->sys_clk_freq / (16.0 * baud_rate) + 0.5)
*/
divisor = ((dev_cfg->devconf.sys_clk_freq + (baud_rate << 3))
divisor = ((dev_cfg->sys_clk_freq + (baud_rate << 3))
/ baud_rate) >> 4;
/* set the DLAB to access the baud rate divisor registers */
@ -345,17 +349,28 @@ static int uart_ns16550_configure(struct device *dev,
ARG_UNUSED(dev_data);
ARG_UNUSED(dev_cfg);
#ifndef UART_NS16550_ACCESS_IOPORT
#ifdef UART_NS16550_PCIE_ENABLED
if (dev_cfg->pcie) {
uintptr_t phys;
if (!pcie_probe(dev_cfg->pcie_bdf, dev_cfg->pcie_id)) {
ret = -EINVAL;
goto out;
}
dev_data->pcimem = pcie_get_mbar(dev_cfg->pcie_bdf, 0);
phys = pcie_get_mbar(dev_cfg->pcie_bdf, 0);
pcie_set_cmd(dev_cfg->pcie_bdf, PCIE_CONF_CMDSTAT_MEM, true);
device_map(DEVICE_MMIO_RAM_PTR(dev), phys, 0x1000,
K_MEM_CACHE_NONE);
} else
#endif /* UART_NS16550_PCIE_ENABLED */
{
/* Map directly from DTS */
DEVICE_MMIO_MAP(dev, K_MEM_CACHE_NONE);
}
#endif
#endif /* UART_NS15660_ACCESS_IOPORT */
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
dev_data->iir_cache = 0U;
@ -492,7 +507,7 @@ static int uart_ns16550_init(struct device *dev)
}
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
DEV_CFG(dev)->devconf.irq_config_func(dev);
DEV_CFG(dev)->irq_config_func(dev);
#endif
return 0;

10
drivers/serial/uart_ns16550_port_x.h
View file

@ -14,11 +14,15 @@ static void irq_config_func_@NUM@(struct device *port);
#endif
static const struct uart_ns16550_device_config uart_ns16550_dev_cfg_@NUM@ = {
.devconf.port = DT_INST_REG_ADDR(@NUM@),
.devconf.sys_clk_freq = DT_INST_PROP(@NUM@, clock_frequency),
#ifdef UART_NS16550_ACCESS_IOPORT
.port = DT_INST_REG_ADDR(@NUM@),
#elif !DT_INST_PROP(@NUM@, pcie)
DEVICE_MMIO_ROM_INIT(@NUM@),
#endif
.sys_clk_freq = DT_INST_PROP(@NUM@, clock_frequency),
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.devconf.irq_config_func = irq_config_func_@NUM@,
.irq_config_func = irq_config_func_@NUM@,
#endif
#if DT_INST_NODE_HAS_PROP(@NUM@, pcp)