From cde9070d9970eef1f7ec2360586c802a16230ad8 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:50 +0000
Subject: [PATCH] rtl88x2CE_WiFi_linux driver
---
kernel/drivers/tty/serial/8250/8250_lpss.c | 147 ++++++++++++++++++++++++++++++++----------------
1 files changed, 98 insertions(+), 49 deletions(-)
diff --git a/kernel/drivers/tty/serial/8250/8250_lpss.c b/kernel/drivers/tty/serial/8250/8250_lpss.c
index 98dbc79..1349c16 100644
--- a/kernel/drivers/tty/serial/8250/8250_lpss.c
+++ b/kernel/drivers/tty/serial/8250/8250_lpss.c
@@ -14,7 +14,7 @@
#include <linux/dmaengine.h>
#include <linux/dma/dw.h>
-#include "8250.h"
+#include "8250_dwlib.h"
#define PCI_DEVICE_ID_INTEL_QRK_UARTx 0x0936
@@ -23,6 +23,13 @@
#define PCI_DEVICE_ID_INTEL_BSW_UART1 0x228a
#define PCI_DEVICE_ID_INTEL_BSW_UART2 0x228c
+
+#define PCI_DEVICE_ID_INTEL_EHL_UART0 0x4b96
+#define PCI_DEVICE_ID_INTEL_EHL_UART1 0x4b97
+#define PCI_DEVICE_ID_INTEL_EHL_UART2 0x4b98
+#define PCI_DEVICE_ID_INTEL_EHL_UART3 0x4b99
+#define PCI_DEVICE_ID_INTEL_EHL_UART4 0x4b9a
+#define PCI_DEVICE_ID_INTEL_EHL_UART5 0x4b9b
#define PCI_DEVICE_ID_INTEL_BDW_UART1 0x9ce3
#define PCI_DEVICE_ID_INTEL_BDW_UART2 0x9ce4
@@ -48,21 +55,25 @@
};
struct lpss8250 {
- int line;
+ struct dw8250_port_data data;
struct lpss8250_board *board;
/* DMA parameters */
- struct uart_8250_dma dma;
struct dw_dma_chip dma_chip;
struct dw_dma_slave dma_param;
u8 dma_maxburst;
};
+static inline struct lpss8250 *to_lpss8250(struct dw8250_port_data *data)
+{
+ return container_of(data, struct lpss8250, data);
+}
+
static void byt_set_termios(struct uart_port *p, struct ktermios *termios,
struct ktermios *old)
{
unsigned int baud = tty_termios_baud_rate(termios);
- struct lpss8250 *lpss = p->private_data;
+ struct lpss8250 *lpss = to_lpss8250(p->private_data);
unsigned long fref = lpss->board->freq, fuart = baud * 16;
unsigned long w = BIT(15) - 1;
unsigned long m, n;
@@ -109,10 +120,8 @@
static int byt_serial_setup(struct lpss8250 *lpss, struct uart_port *port)
{
struct dw_dma_slave *param = &lpss->dma_param;
- struct uart_8250_port *up = up_to_u8250p(port);
struct pci_dev *pdev = to_pci_dev(port->dev);
- unsigned int dma_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
- struct pci_dev *dma_dev = pci_get_slot(pdev->bus, dma_devfn);
+ struct pci_dev *dma_dev;
switch (pdev->device) {
case PCI_DEVICE_ID_INTEL_BYT_UART1:
@@ -131,13 +140,11 @@
return -EINVAL;
}
+ dma_dev = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
+
param->dma_dev = &dma_dev->dev;
param->m_master = 0;
param->p_master = 1;
-
- /* TODO: Detect FIFO size automaticaly for DesignWare 8250 */
- port->fifosize = 64;
- up->tx_loadsz = 64;
lpss->dma_maxburst = 16;
@@ -150,10 +157,29 @@
return 0;
}
+static void byt_serial_exit(struct lpss8250 *lpss)
+{
+ struct dw_dma_slave *param = &lpss->dma_param;
+
+ /* Paired with pci_get_slot() in the byt_serial_setup() above */
+ put_device(param->dma_dev);
+}
+
+static int ehl_serial_setup(struct lpss8250 *lpss, struct uart_port *port)
+{
+ return 0;
+}
+
+static void ehl_serial_exit(struct lpss8250 *lpss)
+{
+ struct uart_8250_port *up = serial8250_get_port(lpss->data.line);
+
+ up->dma = NULL;
+}
+
#ifdef CONFIG_SERIAL_8250_DMA
static const struct dw_dma_platform_data qrk_serial_dma_pdata = {
.nr_channels = 2,
- .is_private = true,
.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
.chan_priority = CHAN_PRIORITY_ASCENDING,
.block_size = 4095,
@@ -164,16 +190,19 @@
static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port)
{
- struct uart_8250_dma *dma = &lpss->dma;
+ struct uart_8250_dma *dma = &lpss->data.dma;
struct dw_dma_chip *chip = &lpss->dma_chip;
struct dw_dma_slave *param = &lpss->dma_param;
struct pci_dev *pdev = to_pci_dev(port->dev);
int ret;
+ chip->pdata = &qrk_serial_dma_pdata;
chip->dev = &pdev->dev;
+ chip->id = pdev->devfn;
chip->irq = pci_irq_vector(pdev, 0);
chip->regs = pci_ioremap_bar(pdev, 1);
- chip->pdata = &qrk_serial_dma_pdata;
+ if (!chip->regs)
+ return;
/* Falling back to PIO mode if DMA probing fails */
ret = dw_dma_probe(chip);
@@ -196,11 +225,15 @@
static void qrk_serial_exit_dma(struct lpss8250 *lpss)
{
+ struct dw_dma_chip *chip = &lpss->dma_chip;
struct dw_dma_slave *param = &lpss->dma_param;
if (!param->dma_dev)
return;
- dw_dma_remove(&lpss->dma_chip);
+
+ dw_dma_remove(chip);
+
+ pci_iounmap(to_pci_dev(chip->dev), chip->regs);
}
#else /* CONFIG_SERIAL_8250_DMA */
static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) {}
@@ -209,17 +242,6 @@
static int qrk_serial_setup(struct lpss8250 *lpss, struct uart_port *port)
{
- struct pci_dev *pdev = to_pci_dev(port->dev);
- int ret;
-
- pci_set_master(pdev);
-
- ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
- if (ret < 0)
- return ret;
-
- port->irq = pci_irq_vector(pdev, 0);
-
qrk_serial_setup_dma(lpss, port);
return 0;
}
@@ -242,12 +264,17 @@
static int lpss8250_dma_setup(struct lpss8250 *lpss, struct uart_8250_port *port)
{
- struct uart_8250_dma *dma = &lpss->dma;
+ struct uart_8250_dma *dma = &lpss->data.dma;
struct dw_dma_slave *rx_param, *tx_param;
struct device *dev = port->port.dev;
- if (!lpss->dma_param.dma_dev)
+ if (!lpss->dma_param.dma_dev) {
+ dma = port->dma;
+ if (dma)
+ goto out_configuration_only;
+
return 0;
+ }
rx_param = devm_kzalloc(dev, sizeof(*rx_param), GFP_KERNEL);
if (!rx_param)
@@ -258,16 +285,18 @@
return -ENOMEM;
*rx_param = lpss->dma_param;
- dma->rxconf.src_maxburst = lpss->dma_maxburst;
-
*tx_param = lpss->dma_param;
- dma->txconf.dst_maxburst = lpss->dma_maxburst;
dma->fn = lpss8250_dma_filter;
dma->rx_param = rx_param;
dma->tx_param = tx_param;
port->dma = dma;
+
+out_configuration_only:
+ dma->rxconf.src_maxburst = lpss->dma_maxburst;
+ dma->txconf.dst_maxburst = lpss->dma_maxburst;
+
return 0;
}
@@ -281,17 +310,23 @@
if (ret)
return ret;
+ pci_set_master(pdev);
+
lpss = devm_kzalloc(&pdev->dev, sizeof(*lpss), GFP_KERNEL);
if (!lpss)
return -ENOMEM;
+
+ ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
+ if (ret < 0)
+ return ret;
lpss->board = (struct lpss8250_board *)id->driver_data;
memset(&uart, 0, sizeof(struct uart_8250_port));
uart.port.dev = &pdev->dev;
- uart.port.irq = pdev->irq;
- uart.port.private_data = lpss;
+ uart.port.irq = pci_irq_vector(pdev, 0);
+ uart.port.private_data = &lpss->data;
uart.port.type = PORT_16550A;
uart.port.iotype = UPIO_MEM;
uart.port.regshift = 2;
@@ -307,6 +342,8 @@
if (ret)
return ret;
+ dw8250_setup_port(&uart.port);
+
ret = lpss8250_dma_setup(lpss, &uart);
if (ret)
goto err_exit;
@@ -315,14 +352,14 @@
if (ret < 0)
goto err_exit;
- lpss->line = ret;
+ lpss->data.line = ret;
pci_set_drvdata(pdev, lpss);
return 0;
err_exit:
- if (lpss->board->exit)
- lpss->board->exit(lpss);
+ lpss->board->exit(lpss);
+ pci_free_irq_vectors(pdev);
return ret;
}
@@ -330,16 +367,24 @@
{
struct lpss8250 *lpss = pci_get_drvdata(pdev);
- serial8250_unregister_port(lpss->line);
+ serial8250_unregister_port(lpss->data.line);
- if (lpss->board->exit)
- lpss->board->exit(lpss);
+ lpss->board->exit(lpss);
+ pci_free_irq_vectors(pdev);
}
static const struct lpss8250_board byt_board = {
.freq = 100000000,
.base_baud = 2764800,
.setup = byt_serial_setup,
+ .exit = byt_serial_exit,
+};
+
+static const struct lpss8250_board ehl_board = {
+ .freq = 200000000,
+ .base_baud = 12500000,
+ .setup = ehl_serial_setup,
+ .exit = ehl_serial_exit,
};
static const struct lpss8250_board qrk_board = {
@@ -349,17 +394,21 @@
.exit = qrk_serial_exit,
};
-#define LPSS_DEVICE(id, board) { PCI_VDEVICE(INTEL, id), (kernel_ulong_t)&board }
-
static const struct pci_device_id pci_ids[] = {
- LPSS_DEVICE(PCI_DEVICE_ID_INTEL_QRK_UARTx, qrk_board),
- LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BYT_UART1, byt_board),
- LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BYT_UART2, byt_board),
- LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BSW_UART1, byt_board),
- LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BSW_UART2, byt_board),
- LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BDW_UART1, byt_board),
- LPSS_DEVICE(PCI_DEVICE_ID_INTEL_BDW_UART2, byt_board),
- { },
+ { PCI_DEVICE_DATA(INTEL, QRK_UARTx, &qrk_board) },
+ { PCI_DEVICE_DATA(INTEL, EHL_UART0, &ehl_board) },
+ { PCI_DEVICE_DATA(INTEL, EHL_UART1, &ehl_board) },
+ { PCI_DEVICE_DATA(INTEL, EHL_UART2, &ehl_board) },
+ { PCI_DEVICE_DATA(INTEL, EHL_UART3, &ehl_board) },
+ { PCI_DEVICE_DATA(INTEL, EHL_UART4, &ehl_board) },
+ { PCI_DEVICE_DATA(INTEL, EHL_UART5, &ehl_board) },
+ { PCI_DEVICE_DATA(INTEL, BYT_UART1, &byt_board) },
+ { PCI_DEVICE_DATA(INTEL, BYT_UART2, &byt_board) },
+ { PCI_DEVICE_DATA(INTEL, BSW_UART1, &byt_board) },
+ { PCI_DEVICE_DATA(INTEL, BSW_UART2, &byt_board) },
+ { PCI_DEVICE_DATA(INTEL, BDW_UART1, &byt_board) },
+ { PCI_DEVICE_DATA(INTEL, BDW_UART2, &byt_board) },
+ { }
};
MODULE_DEVICE_TABLE(pci, pci_ids);
--
Gitblit v1.6.2