From: H Hartley Sweeten Date: Wed, 24 Jul 2013 19:11:25 +0000 (-0700) Subject: staging: comedi: ii_pci20kc.c: cleanup the dio subdevice X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9abeb196a740bd52401a24108df27e20576da036;p=linux-beck.git staging: comedi: ii_pci20kc.c: cleanup the dio subdevice For asethetics, redefine the register map for the carrier board. The 'PCI*' names lead one to think this is a PCI board not a legacy ISA board. Remove the #if 0'd out pci20xxx_{do,di}() functions. They are not needed. Rename, and fix, the pci20xxx_dio_config() function. The control and direction registers are not readable. Use the new register map defines instead of the crazy bit shifts. Rename, and fix, the pci20xxx_dio_insn_config() function. This function should treat data[0] as the 'instruction' to handle not just use it to determine if the port is an input or output. Rename, and tix, the pci20xxx_dio_insn_bits() function. The 'state' only needs to be updated if the 'mask' indicates. For aesthetics, abosrb the pci20xxx_dio_init() into the (*attach) function. Fix the carrier board id detect in the (*attach). There are two carrier board types, one with 32 dio channels and one without. Use this info when setting up the dio subdevice. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/ii_pci20kc.c b/drivers/staging/comedi/drivers/ii_pci20kc.c index 056afdf1165a..60a3bb2c3657 100644 --- a/drivers/staging/comedi/drivers/ii_pci20kc.c +++ b/drivers/staging/comedi/drivers/ii_pci20kc.c @@ -80,33 +80,47 @@ options for PCI-20341M: #include #include "../comedidev.h" -#define PCI20000_ID 0x1d +/* + * Register I/O map + */ +#define II20K_ID_REG 0x00 +#define II20K_ID_MOD1_EMPTY (1 << 7) +#define II20K_ID_MOD2_EMPTY (1 << 6) +#define II20K_ID_MOD3_EMPTY (1 << 5) +#define II20K_ID_MASK 0x1f +#define II20K_ID_PCI20001C_1A 0x1b /* no on-board DIO */ +#define II20K_ID_PCI20001C_2A 0x1d /* on-board DIO */ +#define II20K_MOD_STATUS_REG 0x40 +#define II20K_MOD_STATUS_IRQ_MOD1 (1 << 7) +#define II20K_MOD_STATUS_IRQ_MOD2 (1 << 6) +#define II20K_MOD_STATUS_IRQ_MOD3 (1 << 5) +#define II20K_DIO0_REG 0x80 +#define II20K_DIO1_REG 0x81 +#define II20K_DIR_ENA_REG 0x82 +#define II20K_DIR_DIO3_OUT (1 << 7) +#define II20K_DIR_DIO2_OUT (1 << 6) +#define II20K_BUF_DISAB_DIO3 (1 << 5) +#define II20K_BUF_DISAB_DIO2 (1 << 4) +#define II20K_DIR_DIO1_OUT (1 << 3) +#define II20K_DIR_DIO0_OUT (1 << 2) +#define II20K_BUF_DISAB_DIO1 (1 << 1) +#define II20K_BUF_DISAB_DIO0 (1 << 0) +#define II20K_CTRL01_REG 0x83 +#define II20K_CTRL01_SET (1 << 7) +#define II20K_CTRL01_DIO0_IN (1 << 4) +#define II20K_CTRL01_DIO1_IN (1 << 1) +#define II20K_DIO2_REG 0xc0 +#define II20K_DIO3_REG 0xc1 +#define II20K_CTRL23_REG 0xc3 +#define II20K_CTRL23_SET (1 << 7) +#define II20K_CTRL23_DIO2_IN (1 << 4) +#define II20K_CTRL23_DIO3_IN (1 << 1) + #define PCI20341_ID 0x77 #define PCI20006_ID 0xe3 #define PCI20xxx_EMPTY_ID 0xff #define PCI20000_OFFSET 0x100 -#define PCI20000_MODULES 3 - -#define PCI20000_DIO_0 0x80 -#define PCI20000_DIO_1 0x81 -#define PCI20000_DIO_2 0xc0 -#define PCI20000_DIO_3 0xc1 -#define PCI20000_DIO_CONTROL_01 0x83 /* port 0, 1 control */ -#define PCI20000_DIO_CONTROL_23 0xc3 /* port 2, 3 control */ -#define PCI20000_DIO_BUFFER 0x82 /* buffer direction & enable */ -#define PCI20000_DIO_EOC 0xef /* even port, control output */ -#define PCI20000_DIO_OOC 0xfd /* odd port, control output */ -#define PCI20000_DIO_EIC 0x90 /* even port, control input */ -#define PCI20000_DIO_OIC 0x82 /* odd port, control input */ -#define DIO_CAND 0x12 /* and bit 1 & 4 of control */ -#define DIO_BE 0x01 /* buffer: port enable */ -#define DIO_BO 0x04 /* buffer: output */ -#define DIO_BI 0x05 /* buffer: input */ -#define DIO_PS_0 0x00 /* buffer: port shift 0 */ -#define DIO_PS_1 0x01 /* buffer: port shift 1 */ -#define DIO_PS_2 0x04 /* buffer: port shift 2 */ -#define DIO_PS_3 0x05 /* buffer: port shift 3 */ #define PCI20006_LCHAN0 0x0d #define PCI20006_STROBE0 0x0b @@ -351,103 +365,79 @@ static int pci20341_init(struct comedi_device *dev, struct comedi_subdevice *s, return 0; } -#if 0 -static void pci20xxx_do(struct comedi_device *dev, struct comedi_subdevice *s) -{ - struct pci20xxx_private *devpriv = dev->private; - - /* XXX if the channel is configured for input, does this - do bad things? */ - /* XXX it would be a good idea to only update the registers - that _need_ to be updated. This requires changes to - comedi, however. */ - writeb((s->state >> 0) & 0xff, devpriv->ioaddr + PCI20000_DIO_0); - writeb((s->state >> 8) & 0xff, devpriv->ioaddr + PCI20000_DIO_1); - writeb((s->state >> 16) & 0xff, devpriv->ioaddr + PCI20000_DIO_2); - writeb((s->state >> 24) & 0xff, devpriv->ioaddr + PCI20000_DIO_3); -} - -static unsigned int pci20xxx_di(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pci20xxx_private *devpriv = dev->private; - unsigned int bits; - - /* XXX same note as above */ - bits = readb(devpriv->ioaddr + PCI20000_DIO_0); - bits |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8; - bits |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16; - bits |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24; - - return bits; -} -#endif - -static void pci20xxx_dio_config(struct comedi_device *dev, - struct comedi_subdevice *s) +static void ii20k_dio_config(struct comedi_device *dev, + struct comedi_subdevice *s) { struct pci20xxx_private *devpriv = dev->private; - unsigned char control_01; - unsigned char control_23; - unsigned char buffer; - - control_01 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_01); - control_23 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_23); - buffer = readb(devpriv->ioaddr + PCI20000_DIO_BUFFER); + unsigned char ctrl01 = 0; + unsigned char ctrl23 = 0; + unsigned char dir_ena = 0; + /* port 0 - channels 0-7 */ if (s->io_bits & 0x000000ff) { - /* output port 0 */ - control_01 &= PCI20000_DIO_EOC; - buffer = (buffer & (~(DIO_BE << DIO_PS_0))) | (DIO_BO << - DIO_PS_0); + /* output port */ + ctrl01 &= ~II20K_CTRL01_DIO0_IN; + dir_ena &= ~II20K_BUF_DISAB_DIO0; + dir_ena |= II20K_DIR_DIO0_OUT; } else { - /* input port 0 */ - control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_EIC; - buffer = (buffer & (~(DIO_BI << DIO_PS_0))); + /* input port */ + ctrl01 |= II20K_CTRL01_DIO0_IN; + dir_ena &= ~II20K_DIR_DIO0_OUT; } + + /* port 1 - channels 8-15 */ if (s->io_bits & 0x0000ff00) { - /* output port 1 */ - control_01 &= PCI20000_DIO_OOC; - buffer = (buffer & (~(DIO_BE << DIO_PS_1))) | (DIO_BO << - DIO_PS_1); + /* output port */ + ctrl01 &= ~II20K_CTRL01_DIO1_IN; + dir_ena &= ~II20K_BUF_DISAB_DIO1; + dir_ena |= II20K_DIR_DIO1_OUT; } else { - /* input port 1 */ - control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_OIC; - buffer = (buffer & (~(DIO_BI << DIO_PS_1))); + /* input port */ + ctrl01 |= II20K_CTRL01_DIO1_IN; + dir_ena &= ~II20K_DIR_DIO1_OUT; } + + /* port 2 - channels 16-23 */ if (s->io_bits & 0x00ff0000) { - /* output port 2 */ - control_23 &= PCI20000_DIO_EOC; - buffer = (buffer & (~(DIO_BE << DIO_PS_2))) | (DIO_BO << - DIO_PS_2); + /* output port */ + ctrl23 &= ~II20K_CTRL23_DIO2_IN; + dir_ena &= ~II20K_BUF_DISAB_DIO2; + dir_ena |= II20K_DIR_DIO2_OUT; } else { - /* input port 2 */ - control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_EIC; - buffer = (buffer & (~(DIO_BI << DIO_PS_2))); + /* input port */ + ctrl23 |= II20K_CTRL23_DIO2_IN; + dir_ena &= ~II20K_DIR_DIO2_OUT; } + + /* port 3 - channels 24-31 */ if (s->io_bits & 0xff000000) { - /* output port 3 */ - control_23 &= PCI20000_DIO_OOC; - buffer = (buffer & (~(DIO_BE << DIO_PS_3))) | (DIO_BO << - DIO_PS_3); + /* output port */ + ctrl23 &= ~II20K_CTRL23_DIO3_IN; + dir_ena &= ~II20K_BUF_DISAB_DIO3; + dir_ena |= II20K_DIR_DIO3_OUT; } else { - /* input port 3 */ - control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_OIC; - buffer = (buffer & (~(DIO_BI << DIO_PS_3))); + /* input port */ + ctrl23 |= II20K_CTRL23_DIO3_IN; + dir_ena &= ~II20K_DIR_DIO3_OUT; } - writeb(control_01, devpriv->ioaddr + PCI20000_DIO_CONTROL_01); - writeb(control_23, devpriv->ioaddr + PCI20000_DIO_CONTROL_23); - writeb(buffer, devpriv->ioaddr + PCI20000_DIO_BUFFER); + + ctrl23 |= II20K_CTRL01_SET; + ctrl23 |= II20K_CTRL23_SET; + + /* order is important */ + writeb(ctrl01, devpriv->ioaddr + II20K_CTRL01_REG); + writeb(ctrl23, devpriv->ioaddr + II20K_CTRL23_REG); + writeb(dir_ena, devpriv->ioaddr + II20K_DIR_ENA_REG); } -static int pci20xxx_dio_insn_config(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) +static int ii20k_dio_insn_config(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) { - int mask, bits; + unsigned int mask = 1 << CR_CHAN(insn->chanspec); + unsigned int bits; - mask = 1 << CR_CHAN(insn->chanspec); if (mask & 0x000000ff) bits = 0x000000ff; else if (mask & 0x0000ff00) @@ -456,79 +446,71 @@ static int pci20xxx_dio_insn_config(struct comedi_device *dev, bits = 0x00ff0000; else bits = 0xff000000; - if (data[0]) - s->io_bits |= bits; - else + + switch (data[0]) { + case INSN_CONFIG_DIO_INPUT: s->io_bits &= ~bits; - pci20xxx_dio_config(dev, s); + break; + case INSN_CONFIG_DIO_OUTPUT: + s->io_bits |= bits; + break; + case INSN_CONFIG_DIO_QUERY: + data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT; + return insn->n; + default: + return -EINVAL; + } - return 1; + ii20k_dio_config(dev, s); + + return insn->n; } -static int pci20xxx_dio_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data) +static int ii20k_dio_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) { struct pci20xxx_private *devpriv = dev->private; - unsigned int mask = data[0]; - - s->state &= ~mask; - s->state |= (mask & data[1]); + unsigned int mask = data[0] & s->io_bits; /* outputs only */ + unsigned int bits = data[1]; + + if (mask) { + s->state &= ~mask; + s->state |= (bits & mask); + + if (mask & 0x000000ff) + writeb((s->state >> 0) & 0xff, + devpriv->ioaddr + II20K_DIO0_REG); + if (mask & 0x0000ff00) + writeb((s->state >> 8) & 0xff, + devpriv->ioaddr + II20K_DIO1_REG); + if (mask & 0x00ff0000) + writeb((s->state >> 16) & 0xff, + devpriv->ioaddr + II20K_DIO2_REG); + if (mask & 0xff000000) + writeb((s->state >> 24) & 0xff, + devpriv->ioaddr + II20K_DIO3_REG); + } - mask &= s->io_bits; - if (mask & 0x000000ff) - writeb((s->state >> 0) & 0xff, - devpriv->ioaddr + PCI20000_DIO_0); - if (mask & 0x0000ff00) - writeb((s->state >> 8) & 0xff, - devpriv->ioaddr + PCI20000_DIO_1); - if (mask & 0x00ff0000) - writeb((s->state >> 16) & 0xff, - devpriv->ioaddr + PCI20000_DIO_2); - if (mask & 0xff000000) - writeb((s->state >> 24) & 0xff, - devpriv->ioaddr + PCI20000_DIO_3); - - data[1] = readb(devpriv->ioaddr + PCI20000_DIO_0); - data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8; - data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16; - data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24; + data[1] = readb(devpriv->ioaddr + II20K_DIO0_REG); + data[1] |= readb(devpriv->ioaddr + II20K_DIO1_REG) << 8; + data[1] |= readb(devpriv->ioaddr + II20K_DIO2_REG) << 16; + data[1] |= readb(devpriv->ioaddr + II20K_DIO3_REG) << 24; return insn->n; } -static int pci20xxx_dio_init(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - s->type = COMEDI_SUBD_DIO; - s->subdev_flags = SDF_READABLE | SDF_WRITABLE; - s->n_chan = 32; - s->insn_bits = pci20xxx_dio_insn_bits; - s->insn_config = pci20xxx_dio_insn_config; - s->maxdata = 1; - s->len_chanlist = 32; - s->range_table = &range_digital; - s->io_bits = 0; - - /* digital I/O lines default to input on board reset. */ - pci20xxx_dio_config(dev, s); - - return 0; -} - static int pci20xxx_attach(struct comedi_device *dev, struct comedi_devconfig *it) { struct pci20xxx_private *devpriv; - unsigned char i; - int ret; - int id; - struct comedi_subdevice *s; union pci20xxx_subdev_private *sdp; - - ret = comedi_alloc_subdevices(dev, 1 + PCI20000_MODULES); - if (ret) - return ret; + struct comedi_subdevice *s; + unsigned char id; + bool has_dio; + int ret; + int i; devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); if (!devpriv) @@ -536,17 +518,22 @@ static int pci20xxx_attach(struct comedi_device *dev, devpriv->ioaddr = (void __iomem *)(unsigned long)it->options[0]; - /* Check PCI-20001 C-2A Carrier Board ID */ - if ((readb(devpriv->ioaddr) & PCI20000_ID) != PCI20000_ID) { - dev_warn(dev->class_dev, - "PCI-20001 C-2A Carrier Board at base=0x%p not found !\n", - devpriv->ioaddr); - return -EINVAL; + id = readb(devpriv->ioaddr + II20K_ID_REG); + switch (id & II20K_ID_MASK) { + case II20K_ID_PCI20001C_1A: + break; + case II20K_ID_PCI20001C_2A: + has_dio = true; + break; + default: + return -ENODEV; } - dev_info(dev->class_dev, "PCI-20001 C-2A at base=0x%p\n", - devpriv->ioaddr); - for (i = 0; i < PCI20000_MODULES; i++) { + ret = comedi_alloc_subdevices(dev, 4); + if (ret) + return ret; + + for (i = 0; i < 3; i++) { s = &dev->subdevices[i]; sdp = comedi_alloc_spriv(s, sizeof(*sdp)); if (!sdp) @@ -580,8 +567,22 @@ static int pci20xxx_attach(struct comedi_device *dev, } } - /* initialize struct pci20xxx_private */ - pci20xxx_dio_init(dev, &dev->subdevices[PCI20000_MODULES]); + /* Digital I/O subdevice */ + s = &dev->subdevices[3]; + if (has_dio) { + s->type = COMEDI_SUBD_DIO; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE; + s->n_chan = 32; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = ii20k_dio_insn_bits; + s->insn_config = ii20k_dio_insn_config; + + /* default all channels to input */ + ii20k_dio_config(dev, s); + } else { + s->type = COMEDI_SUBD_UNUSED; + } return 1; }