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Message-ID: <EEE6F4C641AC4593B5CDF5139FCAD0F6@hacdom.okisemi.com>
Date: Tue, 18 Jan 2011 21:36:48 +0900
From: "Tomoya MORINAGA" <tomoya-linux@....okisemi.com>
To: "'Milton Miller'" <miltonm@....com>,
"'Grant Likely'" <grant.likely@...retlab.ca>
Cc: "'David Brownell'" <dbrownell@...rs.sourceforge.net>,
<spi-devel-general@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>, <yong.y.wang@...el.com>,
<joel.clark@...el.com>, <kok.howg.ewe@...el.com>,
"'Toshiharu Okada'" <toshiharu-linux@....okisemi.com>,
"'Wang, Qi'" <qi.wang@...el.com>
Subject: RE: [PATCH 1/3] spi_topcliff_pch: support new device ML7213
Hi Grant,
Need your help!
Could you give us your answer ?
Thanks,
-----------------------------------------
Tomoya MORINAGA
OKI SEMICONDUCTOR CO., LTD.
> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org
> [mailto:linux-kernel-owner@...r.kernel.org] On Behalf Of
> Tomoya MORINAGA
> Sent: Wednesday, January 12, 2011 2:27 PM
> To: 'Milton Miller'; 'Grant Likely'
> Cc: 'David Brownell';
> spi-devel-general@...ts.sourceforge.net;
> linux-kernel@...r.kernel.org; yong.y.wang@...el.com;
> joel.clark@...el.com; kok.howg.ewe@...el.com; 'Toshiharu
> Okada'; 'Wang, Qi'
> Subject: RE: [PATCH 1/3] spi_topcliff_pch: support new device ML7213
>
> On Tuesday, January 11, 2011 6:42 PM, Tomoya MORINAGA wrote:
> > However, I couldn't clear my question.
>
> I show the current our coding image.
> Is the following agreeable with your saying ?
>
> struct spi_platform_data {
> u16 num_chipselect;
> bool little_endian;
> u8 bits_per_word;
> struct spi_board_info *devices;
> u8 num_devices;
> };
>
> static struct resource pch_spi_resources[] = {
> {
> .start = 0,
> .end = 0,
> .flags = IORESOURCE_MEM,
> },
> {
> .start = 0,
> .end = 0,
> .flags = IORESOURCE_IRQ,
> },
> };
>
> static struct spi_platform_data pch_spi_platform_data = {
> .num_chipselect = 2,
> .little_endian = true,
> };
>
> static struct pch_spi_cell pch_spi_cfg0 = {
> .name = "pch_spi",
> .num_resources = ARRAY_SIZE(pch_spi_resources),
> .resources = pch_spi_resources,
> .platform_data = &pch_spi_platform_data,
> .data_size = sizeof(pch_spi_platform_data), };
>
> static int pch_spi_get_resources(struct pch_spi_board_data
> *board_dat, int num) {
> int retval;
> int i;
>
> /* create workqueue */
> board_dat->data[num]->wk =
> create_singlethread_workqueue(KBUILD_MODNAME);
>
> pci_request_regions(board_dat->pdev, KBUILD_MODNAME); }
>
> static int pch_spi_add_device(struct device *parent, int id,
> struct pch_spi_cell *cell,
> struct resource *mem_base, int irq_base,
> struct pch_spi_board_data *board_dat) {
>
> platform_device_alloc(cell->name, id + cell->id);
>
> res = kzalloc(sizeof(*res) * cell->num_resources, GFP_KERNEL);
> if (!res)
> goto fail_device;
>
> platform_set_drvdata(pdev, cell->driver_data);
>
> if (cell->data_size) {
> platform_device_add_data(pdev,
> cell->platform_data,
> cell->data_size);
> }
>
> for (i = 0; i < cell->num_resources; i++) {
> if ((cell->resources[i].flags & IORESOURCE_MEM)
> && mem_base) {
> res[i].parent =
> res[i].start =
> res[i].end =
> } else if (cell->resources[i].flags & IORESOURCE_IRQ) {
> res[i].start =
> res[i].end =
> } else {
>
>
> }
>
> ret = platform_device_add_resources(pdev, res,
> cell->num_resources);
> if (ret)
> goto fail_res;
>
> ret = platform_device_add(pdev);
> if (ret)
> goto fail_res;
>
> kfree(res);
>
> spi_alloc_master( );
>
> board_dat->data[num] = spi_master_get_devdata( );
>
> pch_spi_get_resources( );
>
> /* set master mode */
> pch_spi_set_master_mode( );
>
> /* Register the controller with the SPI core. */
> spi_register_master( );
>
> return 0;
> }
>
> int pch_spi_add_devices(struct device *parent,
> struct pch_spi_cell *cells, int n_devs,
> struct resource *mem_base,
> struct pch_spi_board_data *board_dat) {
> pci_iomap()
>
> for (i < n_devs)
> pch_spi_add_device()
>
> }
>
> static int pch_spi_probe(struct pci_dev *pdev, const struct
> pci_device_id *id) {
> board_dat = kzalloc(sizeof(struct pch_spi_board_data),
> GFP_KERNEL);
> pci_enable_device()
> request_irq()
> pch_spi_add_devices(&pdev->dev,
> &pch_spi_cfg0,
> 2,
> &pdev->resource[0], board_dat);
>
> }
>
> static irqreturn_t pch_spi_handler(int irq, void *dev_id) {
>
> for (i = 0; i < board_dat->num; i++) {
> data = board_dat->data[i];
> io_remap_addr = data->io_remap_addr;
> spsr = io_remap_addr + PCH_SPSR;
>
> reg_spsr_val = ioread32(spsr);
>
> /* Check if the interrupt is for SPI device */
> if (reg_spsr_val & (SPSR_FI_BIT | SPSR_RFI_BIT)) {
> pch_spi_handler_sub(data, reg_spsr_val,
> io_remap_addr);
> ret = IRQ_HANDLED;
> }
>
> dev_dbg(&board_dat->pdev->dev, "%s EXIT return
> value=%d\n",
> __func__, ret);
> }
> return ret;
> }
>
> Thanks,
> -----------------------------------------
> Tomoya MORINAGA
> OKI SEMICONDUCTOR CO., LTD.
>
> --
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