From dd52856ba24ed2f67679c86f207e5a9bab1eb93b Mon Sep 17 00:00:00 2001 From: Sebastian Haas Date: Tue, 21 Jul 2009 12:38:13 -0700 Subject: [PATCH] can: sja1000: Add support for the new 4 channel EMS CPC-PCI cards This patch adds support to the ems_pci driver for the new, v2, 4 channel CPC-PCI/PCIe/104P CAN cards from EMS Dr. Thomas Wuensche. Signed-off-by: Sebastian Haas Signed-off-by: Wolfgang Grandegger Signed-off-by: David S. Miller --- drivers/net/can/Kconfig | 7 +- drivers/net/can/sja1000/ems_pci.c | 152 +++++++++++++++++++++--------- 2 files changed, 112 insertions(+), 47 deletions(-) diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig index 33821a81cbf8..30ae55d71678 100644 --- a/drivers/net/can/Kconfig +++ b/drivers/net/can/Kconfig @@ -61,11 +61,12 @@ config CAN_SJA1000_OF_PLATFORM you may want to enable this option. config CAN_EMS_PCI - tristate "EMS CPC-PCI and CPC-PCIe Card" + tristate "EMS CPC-PCI, CPC-PCIe and CPC-104P Card" depends on PCI && CAN_SJA1000 ---help--- - This driver is for the one or two channel CPC-PCI and CPC-PCIe - cards from EMS Dr. Thomas Wuensche (http://www.ems-wuensche.de). + This driver is for the one, two or four channel CPC-PCI, + CPC-PCIe and CPC-104P cards from EMS Dr. Thomas Wuensche + (http://www.ems-wuensche.de). config CAN_KVASER_PCI tristate "Kvaser PCIcanx and Kvaser PCIcan PCI Cards" 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 "); -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; @@ -62,13 +65,23 @@ struct ems_pci_card { #define PITA2_MISC 0x1c /* Miscellaneous Register */ #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); -- 2.30.2