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path: root/drivers/net/can/sja1000/ems_pci.c
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Diffstat (limited to 'drivers/net/can/sja1000/ems_pci.c')
-rw-r--r--drivers/net/can/sja1000/ems_pci.c152
1 files changed, 108 insertions, 44 deletions
diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c
index 121b64101d72..7d84b8ac9c1c 100644
--- a/drivers/net/can/sja1000/ems_pci.c
+++ b/drivers/net/can/sja1000/ems_pci.c
@@ -32,13 +32,16 @@
#define DRV_NAME "ems_pci"
MODULE_AUTHOR("Sebastian Haas <haas@ems-wuenche.com>");
-MODULE_DESCRIPTION("Socket-CAN driver for EMS CPC-PCI/PCIe CAN cards");
-MODULE_SUPPORTED_DEVICE("EMS CPC-PCI/PCIe CAN card");
+MODULE_DESCRIPTION("Socket-CAN driver for EMS CPC-PCI/PCIe/104P CAN cards");
+MODULE_SUPPORTED_DEVICE("EMS CPC-PCI/PCIe/104P CAN card");
MODULE_LICENSE("GPL v2");
-#define EMS_PCI_MAX_CHAN 2
+#define EMS_PCI_V1_MAX_CHAN 2
+#define EMS_PCI_V2_MAX_CHAN 4
+#define EMS_PCI_MAX_CHAN EMS_PCI_V2_MAX_CHAN
struct ems_pci_card {
+ int version;
int channels;
struct pci_dev *pci_dev;
@@ -63,12 +66,22 @@ struct ems_pci_card {
#define PITA2_MISC_CONFIG 0x04000000 /* Multiplexed parallel interface */
/*
+ * Register definitions for the PLX 9030
+ */
+#define PLX_ICSR 0x4c /* Interrupt Control/Status register */
+#define PLX_ICSR_LINTI1_ENA 0x0001 /* LINTi1 Enable */
+#define PLX_ICSR_PCIINT_ENA 0x0040 /* PCI Interrupt Enable */
+#define PLX_ICSR_LINTI1_CLR 0x0400 /* Local Edge Triggerable Interrupt Clear */
+#define PLX_ICSR_ENA_CLR (PLX_ICSR_LINTI1_ENA | PLX_ICSR_PCIINT_ENA | \
+ PLX_ICSR_LINTI1_CLR)
+
+/*
* The board configuration is probably following:
* RX1 is connected to ground.
* TX1 is not connected.
* CLKO is not connected.
* Setting the OCR register to 0xDA is a good idea.
- * This means normal output mode , push-pull and the correct polarity.
+ * This means normal output mode, push-pull and the correct polarity.
*/
#define EMS_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
@@ -79,17 +92,21 @@ struct ems_pci_card {
* is driven by the first one CLKOUT output.
*/
#define EMS_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
-#define EMS_PCI_MEM_SIZE 4096 /* Size of the remapped io-memory */
+
+#define EMS_PCI_V1_BASE_BAR 1
+#define EMS_PCI_V1_MEM_SIZE 4096
+#define EMS_PCI_V2_BASE_BAR 2
+#define EMS_PCI_V2_MEM_SIZE 128
#define EMS_PCI_CAN_BASE_OFFSET 0x400 /* offset where the controllers starts */
#define EMS_PCI_CAN_CTRL_SIZE 0x200 /* memory size for each controller */
-#define EMS_PCI_PORT_BYTES 0x4 /* Each register occupies 4 bytes */
-
-#define EMS_PCI_VENDOR_ID 0x110a /* PCI device and vendor ID */
-#define EMS_PCI_DEVICE_ID 0x2104
-
static struct pci_device_id ems_pci_tbl[] = {
- {EMS_PCI_VENDOR_ID, EMS_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+ /* CPC-PCI v1 */
+ {PCI_VENDOR_ID_SIEMENS, 0x2104, PCI_ANY_ID, PCI_ANY_ID,},
+ /* CPC-PCI v2 */
+ {PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030, PCI_VENDOR_ID_PLX, 0x4000},
+ /* CPC-104P v2 */
+ {PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030, PCI_VENDOR_ID_PLX, 0x4002},
{0,}
};
MODULE_DEVICE_TABLE(pci, ems_pci_tbl);
@@ -97,28 +114,47 @@ MODULE_DEVICE_TABLE(pci, ems_pci_tbl);
/*
* Helper to read internal registers from card logic (not CAN)
*/
-static u8 ems_pci_readb(struct ems_pci_card *card, unsigned int port)
+static u8 ems_pci_v1_readb(struct ems_pci_card *card, unsigned int port)
{
- return readb(card->base_addr + (port * EMS_PCI_PORT_BYTES));
+ return readb(card->base_addr + (port * 4));
}
-static u8 ems_pci_read_reg(const struct sja1000_priv *priv, int port)
+static u8 ems_pci_v1_read_reg(const struct sja1000_priv *priv, int port)
{
- return readb(priv->reg_base + (port * EMS_PCI_PORT_BYTES));
+ return readb(priv->reg_base + (port * 4));
}
-static void ems_pci_write_reg(const struct sja1000_priv *priv, int port, u8 val)
+static void ems_pci_v1_write_reg(const struct sja1000_priv *priv,
+ int port, u8 val)
{
- writeb(val, priv->reg_base + (port * EMS_PCI_PORT_BYTES));
+ writeb(val, priv->reg_base + (port * 4));
}
-static void ems_pci_post_irq(const struct sja1000_priv *priv)
+static void ems_pci_v1_post_irq(const struct sja1000_priv *priv)
{
struct ems_pci_card *card = (struct ems_pci_card *)priv->priv;
/* reset int flag of pita */
- writel(PITA2_ICR_INT0_EN | PITA2_ICR_INT0, card->conf_addr
- + PITA2_ICR);
+ writel(PITA2_ICR_INT0_EN | PITA2_ICR_INT0,
+ card->conf_addr + PITA2_ICR);
+}
+
+static u8 ems_pci_v2_read_reg(const struct sja1000_priv *priv, int port)
+{
+ return readb(priv->reg_base + port);
+}
+
+static void ems_pci_v2_write_reg(const struct sja1000_priv *priv,
+ int port, u8 val)
+{
+ writeb(val, priv->reg_base + port);
+}
+
+static void ems_pci_v2_post_irq(const struct sja1000_priv *priv)
+{
+ struct ems_pci_card *card = (struct ems_pci_card *)priv->priv;
+
+ writel(PLX_ICSR_ENA_CLR, card->conf_addr + PLX_ICSR);
}
/*
@@ -130,12 +166,12 @@ static inline int ems_pci_check_chan(const struct sja1000_priv *priv)
unsigned char res;
/* Make sure SJA1000 is in reset mode */
- ems_pci_write_reg(priv, REG_MOD, 1);
+ priv->write_reg(priv, REG_MOD, 1);
- ems_pci_write_reg(priv, REG_CDR, CDR_PELICAN);
+ priv->write_reg(priv, REG_CDR, CDR_PELICAN);
/* read reset-values */
- res = ems_pci_read_reg(priv, REG_CDR);
+ res = priv->read_reg(priv, REG_CDR);
if (res == CDR_PELICAN)
return 1;
@@ -188,6 +224,7 @@ static int __devinit ems_pci_add_card(struct pci_dev *pdev,
struct sja1000_priv *priv;
struct net_device *dev;
struct ems_pci_card *card;
+ int max_chan, mem_size, base_bar;
int err, i;
/* Enabling PCI device */
@@ -210,37 +247,52 @@ static int __devinit ems_pci_add_card(struct pci_dev *pdev,
card->channels = 0;
- /* Remap PITA configuration space, and controller memory area */
- card->conf_addr = pci_iomap(pdev, 0, EMS_PCI_MEM_SIZE);
+ if (pdev->vendor == PCI_VENDOR_ID_PLX) {
+ card->version = 2; /* CPC-PCI v2 */
+ max_chan = EMS_PCI_V2_MAX_CHAN;
+ base_bar = EMS_PCI_V2_BASE_BAR;
+ mem_size = EMS_PCI_V2_MEM_SIZE;
+ } else {
+ card->version = 1; /* CPC-PCI v1 */
+ max_chan = EMS_PCI_V1_MAX_CHAN;
+ base_bar = EMS_PCI_V1_BASE_BAR;
+ mem_size = EMS_PCI_V1_MEM_SIZE;
+ }
+
+ /* Remap configuration space and controller memory area */
+ card->conf_addr = pci_iomap(pdev, 0, mem_size);
if (card->conf_addr == NULL) {
err = -ENOMEM;
goto failure_cleanup;
}
- card->base_addr = pci_iomap(pdev, 1, EMS_PCI_MEM_SIZE);
+ card->base_addr = pci_iomap(pdev, base_bar, mem_size);
if (card->base_addr == NULL) {
err = -ENOMEM;
goto failure_cleanup;
}
- /* Configure PITA-2 parallel interface (enable MUX) */
- writel(PITA2_MISC_CONFIG, card->conf_addr + PITA2_MISC);
-
- /* Check for unique EMS CAN signature */
- if (ems_pci_readb(card, 0) != 0x55 ||
- ems_pci_readb(card, 1) != 0xAA ||
- ems_pci_readb(card, 2) != 0x01 ||
- ems_pci_readb(card, 3) != 0xCB ||
- ems_pci_readb(card, 4) != 0x11) {
- dev_err(&pdev->dev, "Not EMS Dr. Thomas Wuensche interface\n");
- err = -ENODEV;
- goto failure_cleanup;
+ if (card->version == 1) {
+ /* Configure PITA-2 parallel interface (enable MUX) */
+ writel(PITA2_MISC_CONFIG, card->conf_addr + PITA2_MISC);
+
+ /* Check for unique EMS CAN signature */
+ if (ems_pci_v1_readb(card, 0) != 0x55 ||
+ ems_pci_v1_readb(card, 1) != 0xAA ||
+ ems_pci_v1_readb(card, 2) != 0x01 ||
+ ems_pci_v1_readb(card, 3) != 0xCB ||
+ ems_pci_v1_readb(card, 4) != 0x11) {
+ dev_err(&pdev->dev,
+ "Not EMS Dr. Thomas Wuensche interface\n");
+ err = -ENODEV;
+ goto failure_cleanup;
+ }
}
ems_pci_card_reset(card);
/* Detect available channels */
- for (i = 0; i < EMS_PCI_MAX_CHAN; i++) {
+ for (i = 0; i < max_chan; i++) {
dev = alloc_sja1000dev(0);
if (dev == NULL) {
err = -ENOMEM;
@@ -255,20 +307,32 @@ static int __devinit ems_pci_add_card(struct pci_dev *pdev,
dev->irq = pdev->irq;
priv->reg_base = card->base_addr + EMS_PCI_CAN_BASE_OFFSET
+ (i * EMS_PCI_CAN_CTRL_SIZE);
+ if (card->version == 1) {
+ priv->read_reg = ems_pci_v1_read_reg;
+ priv->write_reg = ems_pci_v1_write_reg;
+ priv->post_irq = ems_pci_v1_post_irq;
+ } else {
+ priv->read_reg = ems_pci_v2_read_reg;
+ priv->write_reg = ems_pci_v2_write_reg;
+ priv->post_irq = ems_pci_v2_post_irq;
+ }
/* Check if channel is present */
if (ems_pci_check_chan(priv)) {
- priv->read_reg = ems_pci_read_reg;
- priv->write_reg = ems_pci_write_reg;
- priv->post_irq = ems_pci_post_irq;
priv->can.clock.freq = EMS_PCI_CAN_CLOCK;
priv->ocr = EMS_PCI_OCR;
priv->cdr = EMS_PCI_CDR;
SET_NETDEV_DEV(dev, &pdev->dev);
- /* Enable interrupts from card */
- writel(PITA2_ICR_INT0_EN, card->conf_addr + PITA2_ICR);
+ if (card->version == 1)
+ /* reset int flag of pita */
+ writel(PITA2_ICR_INT0_EN | PITA2_ICR_INT0,
+ card->conf_addr + PITA2_ICR);
+ else
+ /* enable IRQ in PLX 9030 */
+ writel(PLX_ICSR_ENA_CLR,
+ card->conf_addr + PLX_ICSR);
/* Register SJA1000 device */
err = register_sja1000dev(dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 12:23:54 +0000