From 4048e5ca29afbd747a16245f2bc4d1d521a6d0d0 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Fri, 26 Jun 2009 06:59:17 +0000 Subject: [PATCH] usb: m66592-udc buffer management update This patch updates the m66592-udc buffer management code. Use fixed buffers for bulk and isochronous pipes, also make sure to handle the isochronous-as-bulk case. With fixed buffers there is no need to keep track of used buffers with bi_bufnum. Also, this fixes a potential buffer offset problem where the base offset incorrectly varies with the number of pipes used. With this patch applied it is possible to use m66592-udc for both Ethernet and Serial using CONFIG_USB_CDC_COMPOSITE. Signed-off-by: Magnus Damm Acked-by: Yoshihiro Shimoda Acked-by: Greg Kroah-Hartman Signed-off-by: Paul Mundt --- drivers/usb/gadget/m66592-udc.c | 34 ++++++++++++--------------------- drivers/usb/gadget/m66592-udc.h | 1 - 2 files changed, 12 insertions(+), 23 deletions(-) diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c index 43dcf9e1af6b..0dddd2f8ff35 100644 --- a/drivers/usb/gadget/m66592-udc.c +++ b/drivers/usb/gadget/m66592-udc.c @@ -37,7 +37,7 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Yoshihiro Shimoda"); MODULE_ALIAS("platform:m66592_udc"); -#define DRIVER_VERSION "18 Oct 2007" +#define DRIVER_VERSION "26 Jun 2009" /* module parameters */ #if defined(CONFIG_SUPERH_BUILT_IN_M66592) @@ -276,24 +276,27 @@ static int pipe_buffer_setting(struct m66592 *m66592, buf_bsize = 0; break; case M66592_BULK: - bufnum = m66592->bi_bufnum + - (info->pipe - M66592_BASE_PIPENUM_BULK) * 16; - m66592->bi_bufnum += 16; + /* isochronous pipes may be used as bulk pipes */ + if (info->pipe > M66592_BASE_PIPENUM_BULK) + bufnum = info->pipe - M66592_BASE_PIPENUM_BULK; + else + bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC; + + bufnum = M66592_BASE_BUFNUM + (bufnum * 16); buf_bsize = 7; pipecfg |= M66592_DBLB; if (!info->dir_in) pipecfg |= M66592_SHTNAK; break; case M66592_ISO: - bufnum = m66592->bi_bufnum + + bufnum = M66592_BASE_BUFNUM + (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16; - m66592->bi_bufnum += 16; buf_bsize = 7; break; } - if (m66592->bi_bufnum > M66592_MAX_BUFNUM) { - pr_err("m66592 pipe memory is insufficient(%d)\n", - m66592->bi_bufnum); + + if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) { + pr_err("m66592 pipe memory is insufficient\n"); return -ENOMEM; } @@ -313,17 +316,6 @@ static void pipe_buffer_release(struct m66592 *m66592, if (info->pipe == 0) return; - switch (info->type) { - case M66592_BULK: - if (is_bulk_pipe(info->pipe)) - m66592->bi_bufnum -= 16; - break; - case M66592_ISO: - if (is_isoc_pipe(info->pipe)) - m66592->bi_bufnum -= 16; - break; - } - if (is_bulk_pipe(info->pipe)) { m66592->bulk--; } else if (is_interrupt_pipe(info->pipe)) @@ -1603,8 +1595,6 @@ static int __init m66592_probe(struct platform_device *pdev) m66592->timer.data = (unsigned long)m66592; m66592->reg = reg; - m66592->bi_bufnum = M66592_BASE_BUFNUM; - ret = request_irq(irq, m66592_irq, IRQF_DISABLED | IRQF_SHARED, udc_name, m66592); if (ret < 0) { diff --git a/drivers/usb/gadget/m66592-udc.h b/drivers/usb/gadget/m66592-udc.h index 286ce07e7960..9a9c2bf9fbd5 100644 --- a/drivers/usb/gadget/m66592-udc.h +++ b/drivers/usb/gadget/m66592-udc.h @@ -506,7 +506,6 @@ struct m66592 { int interrupt; int isochronous; int num_dma; - int bi_bufnum; /* bulk and isochronous's bufnum */ }; #define gadget_to_m66592(_gadget) container_of(_gadget, struct m66592, gadget) -- 2.39.5